227969006521 has 3 divisors (see below), whose sum is σ = 227969483983. Its totient is φ = 227968529060.

The previous prime is 227969006513. The next prime is 227969006549. The reversal of 227969006521 is 125600969722.

The square root of 227969006521 is 477461.

It is a perfect power (a square), and thus also a powerful number.

227969006521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 125600969722 = 2 ⋅62800484861.

It can be written as a sum of positive squares in only one way, i.e., 176684874921 + 51284131600 = 420339^2 + 226460^2 .

It is not a de Polignac number, because 227969006521 - 2³ = 227969006513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (227969006501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 238731 + ... + 716191.

Almost surely, 2^227969006521 is an apocalyptic number.

227969006521 is the 477461-st square number.

227969006521 is the 238731-st centered octagonal number.

It is an amenable number.

227969006521 is a deficient number, since it is larger than the sum of its proper divisors (477462).

227969006521 is an frugal number, since it uses more digits than its factorization.

227969006521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954922 (or 477461 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 49.

Multiplying 227969006521 by its sum of digits (49), we get a square (11170481319529 = 3342227²).

The spelling of 227969006521 in words is "two hundred twenty-seven billion, nine hundred sixty-nine million, six thousand, five hundred twenty-one".