221770552 has 16 divisors (see below), whose sum is σ = 416873160. Its totient is φ = 110604384.

The previous prime is 221770541. The next prime is 221770553. The reversal of 221770552 is 255077122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221770553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31738 + ... + 38089.

Almost surely, 2^221770552 is an apocalyptic number.

It is an amenable number.

221770552 is a deficient number, since it is larger than the sum of its proper divisors (195102608).

221770552 is a wasteful number, since it uses less digits than its factorization.

221770552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70230 (or 70226 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 221770552 is about 14891.9626644711. The cubic root of 221770552 is about 605.2962163044.

The spelling of 221770552 in words is "two hundred twenty-one million, seven hundred seventy thousand, five hundred fifty-two".