251242152 has 32 divisors (see below), whose sum is σ = 717835200. Its totient is φ = 71783424.

The previous prime is 251242151. The next prime is 251242153.

251242152 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (251242151) and next prime (251242153).

It is a super-2 number, since 2×251242152² = 126245237883182208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (251242151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747577 + ... + 747912.

It is an arithmetic number, because the mean of its divisors is an integer number (22432350).

Almost surely, 2^251242152 is an apocalyptic number.

It is an amenable number.

251242152 is an abundant number, since it is smaller than the sum of its proper divisors (466593048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251242152 is a wasteful number, since it uses less digits than its factorization.

251242152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495505 (or 1495501 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 251242152 is about 15850.6199247853. The cubic root of 251242152 is about 631.0021440165.

The spelling of 251242152 in words is "two hundred fifty-one million, two hundred forty-two thousand, one hundred fifty-two".