221892752 has 10 divisors (see below), whose sum is σ = 429917238. Its totient is φ = 110946368.

The previous prime is 221892731. The next prime is 221892757. The reversal of 221892752 is 257298122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 221890816 + 1936 = 14896^2 + 44^2 .

It is not an unprimeable number, because it can be changed into a prime (221892757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6934133 + ... + 6934164.

Almost surely, 2^221892752 is an apocalyptic number.

It is an amenable number.

221892752 is a deficient number, since it is larger than the sum of its proper divisors (208024486).

221892752 is a wasteful number, since it uses less digits than its factorization.

221892752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13868305 (or 13868299 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 221892752 is about 14896.0649837465. The cubic root of 221892752 is about 605.4073726555.

The spelling of 221892752 in words is "two hundred twenty-one million, eight hundred ninety-two thousand, seven hundred fifty-two".