251604215210 has 16 divisors (see below), whose sum is σ = 455163408000. Its totient is φ = 100135948176.

The previous prime is 251604215207. The next prime is 251604215227. The reversal of 251604215210 is 12512406152.

It is a super-2 number, since 2×251604215210² (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, 63215150 + ... + 63219129.

It is an arithmetic number, because the mean of its divisors is an integer number (28447713000).

Almost surely, 2^251604215210 is an apocalyptic number.

251604215210 is a deficient number, since it is larger than the sum of its proper divisors (203559192790).

251604215210 is a wasteful number, since it uses less digits than its factorization.

251604215210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126434485.

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 251604215210 in words is "two hundred fifty-one billion, six hundred four million, two hundred fifteen thousand, two hundred ten".