251245253042 has 64 divisors (see below), whose sum is σ = 464235577344. Its totient is φ = 99606957120.

The previous prime is 251245253029. The next prime is 251245253053. The reversal of 251245253042 is 240352542152.

It is a happy number.

It is a super-2 number, since 2×251245253042² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 251245252993 and 251245253011.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16892093 + ... + 16906959.

It is an arithmetic number, because the mean of its divisors is an integer number (7253680896).

Almost surely, 2^251245253042 is an apocalyptic number.

251245253042 is a deficient number, since it is larger than the sum of its proper divisors (212990324302).

251245253042 is a wasteful number, since it uses less digits than its factorization.

251245253042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16623.

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 251245253042 its reverse (240352542152), we get a palindrome (491597795194).

The spelling of 251245253042 in words is "two hundred fifty-one billion, two hundred forty-five million, two hundred fifty-three thousand, forty-two".