251145032 has 8 divisors (see below), whose sum is σ = 470896950. Its totient is φ = 125572512.

The previous prime is 251145031. The next prime is 251145077. The reversal of 251145032 is 230541152.

251145032 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., 242300356 + 8844676 = 15566^2 + 2974^2 .

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 = 251144989 and 251145007.

It is not an unprimeable number, because it can be changed into a prime (251145031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15696557 + ... + 15696572.

Almost surely, 2^251145032 is an apocalyptic number.

It is an amenable number.

251145032 is a deficient number, since it is larger than the sum of its proper divisors (219751918).

251145032 is a wasteful number, since it uses less digits than its factorization.

251145032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31393135 (or 31393131 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 251145032 is about 15847.5560260881. The cubic root of 251145032 is about 630.9208269473.

Adding to 251145032 its reverse (230541152), we get a palindrome (481686184).

The spelling of 251145032 in words is "two hundred fifty-one million, one hundred forty-five thousand, thirty-two".