251125105 has 96 divisors (see below), whose sum is σ = 416616192. Its totient is φ = 141004800.

The previous prime is 251125099. The next prime is 251125151. The reversal of 251125105 is 501521152.

It is a happy number.

It is not a de Polignac number, because 251125105 - 2⁵ = 251125073 is a prime.

It is a super-2 number, since 2×251125105² = 126127636722522050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4116775 + ... + 4116835.

It is an arithmetic number, because the mean of its divisors is an integer number (4339752).

Almost surely, 2^251125105 is an apocalyptic number.

It is an amenable number.

251125105 is a deficient number, since it is larger than the sum of its proper divisors (165491087).

251125105 is a wasteful number, since it uses less digits than its factorization.

251125105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 251125105 is about 15846.9273046859. The cubic root of 251125105 is about 630.9041397875.

Adding to 251125105 its reverse (501521152), we get a palindrome (752646257).

The spelling of 251125105 in words is "two hundred fifty-one million, one hundred twenty-five thousand, one hundred five".