251414000138 has 36 divisors (see below), whose sum is σ = 439533935190. Its totient is φ = 107542405152.

The previous prime is 251414000129. The next prime is 251414000141. The reversal of 251414000138 is 831000414152.

It can be written as a sum of positive squares in 3 ways, for example, as 164603038369 + 86810961769 = 405713^2 + 294637^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 251414000138.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 30400268 + ... + 30408536.

Almost surely, 2^251414000138 is an apocalyptic number.

251414000138 is a deficient number, since it is larger than the sum of its proper divisors (188119935052).

251414000138 is an frugal number, since it uses more digits than its factorization.

251414000138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9399 (or 8835 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The spelling of 251414000138 in words is "two hundred fifty-one billion, four hundred fourteen million, one hundred thirty-eight", and thus it is an aban number.