251222152 has 8 divisors (see below), whose sum is σ = 471041550. Its totient is φ = 125611072.

The previous prime is 251222113. The next prime is 251222189.

251222152 is nontrivially palindromic in base 10.

251222152 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 247558756 + 3663396 = 15734^2 + 1914^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×251222152² = 126225139311022208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15701377 + ... + 15701392.

Almost surely, 2^251222152 is an apocalyptic number.

It is an amenable number.

251222152 is a deficient number, since it is larger than the sum of its proper divisors (219819398).

251222152 is a wasteful number, since it uses less digits than its factorization.

251222152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31402775 (or 31402771 counting only the distinct ones).

The product of its digits is 800, while the sum is 22.

The square root of 251222152 is about 15849.9890220782. The cubic root of 251222152 is about 630.9854000404.

The spelling of 251222152 in words is "two hundred fifty-one million, two hundred twenty-two thousand, one hundred fifty-two".