251123404232 has 8 divisors (see below), whose sum is σ = 470856382950. Its totient is φ = 125561702112.

The previous prime is 251123404229. The next prime is 251123404247. The reversal of 251123404232 is 232404321152.

251123404232 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., 152229507556 + 98893896676 = 390166^2 + 314474^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 251123404195 and 251123404204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15695212757 + ... + 15695212772.

Almost surely, 2^251123404232 is an apocalyptic number.

It is an amenable number.

251123404232 is a deficient number, since it is larger than the sum of its proper divisors (219732978718).

251123404232 is a wasteful number, since it uses less digits than its factorization.

251123404232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31390425535 (or 31390425531 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 251123404232 its reverse (232404321152), we get a palindrome (483527725384).

The spelling of 251123404232 in words is "two hundred fifty-one billion, one hundred twenty-three million, four hundred four thousand, two hundred thirty-two".