251422514134 has 32 divisors (see below), whose sum is σ = 429365339136. Its totient is φ = 109299136320.

The previous prime is 251422514093. The next prime is 251422514153. The reversal of 251422514134 is 431415224152.

It is a super-2 number, since 2×251422514134² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 251422514134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4168339 + ... + 4228225.

It is an arithmetic number, because the mean of its divisors is an integer number (13417666848).

Almost surely, 2^251422514134 is an apocalyptic number.

251422514134 is a deficient number, since it is larger than the sum of its proper divisors (177942825002).

251422514134 is a wasteful number, since it uses less digits than its factorization.

251422514134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68220.

The product of its digits is 38400, while the sum is 34.

Adding to 251422514134 its reverse (431415224152), we get a palindrome (682837738286).

The spelling of 251422514134 in words is "two hundred fifty-one billion, four hundred twenty-two million, five hundred fourteen thousand, one hundred thirty-four".