227690254561 has 27 divisors (see below), whose sum is σ = 291178682067. Its totient is φ = 177392347440.

The previous prime is 227690254553. The next prime is 227690254577. The reversal of 227690254561 is 165452096722.

The square root of 227690254561 is 477169.

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

It can be written as a sum of positive squares in only one way, i.e., 89487731025 + 138202523536 = 299145^2 + 371756^2 .

It is not a de Polignac number, because 227690254561 - 2³ = 227690254553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (227690254261) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 36738915 + ... + 36745111.

Almost surely, 2^227690254561 is an apocalyptic number.

227690254561 is the 477169-th square number.

227690254561 is the 238585-th centered octagonal number.

It is an amenable number.

227690254561 is a deficient number, since it is larger than the sum of its proper divisors (63488427506).

227690254561 is an frugal number, since it uses more digits than its factorization.

227690254561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12430 (or 6215 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 49.

Multiplying 227690254561 by its sum of digits (49), we get a square (11156822473489 = 3340183²).

227690254561 divided by its sum of digits (49) gives a square (4646739889 = 68167²).

The spelling of 227690254561 in words is "two hundred twenty-seven billion, six hundred ninety million, two hundred fifty-four thousand, five hundred sixty-one".