251503234216 has 32 divisors (see below), whose sum is σ = 510249952800. Its totient is φ = 115528271040.

The previous prime is 251503234207. The next prime is 251503234237. The reversal of 251503234216 is 612432305152.

It is a super-2 number, since 2×251503234216² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5708626 + ... + 5752513.

It is an arithmetic number, because the mean of its divisors is an integer number (15945311025).

Almost surely, 2^251503234216 is an apocalyptic number.

251503234216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

251503234216 is an abundant number, since it is smaller than the sum of its proper divisors (258746718584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251503234216 is a wasteful number, since it uses less digits than its factorization.

251503234216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11461369 (or 11461365 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 251503234216 its reverse (612432305152), we get a palindrome (863935539368).

The spelling of 251503234216 in words is "two hundred fifty-one billion, five hundred three million, two hundred thirty-four thousand, two hundred sixteen".