251364650212 has 24 divisors (see below), whose sum is σ = 475794380600. Its totient is φ = 115507835136.

The previous prime is 251364650183. The next prime is 251364650237. The reversal of 251364650212 is 212056463152.

It can be written as a sum of positive squares in 4 ways, for example, as 96046687396 + 155317962816 = 309914^2 + 394104^2 .

It is a super-2 number, since 2×251364650212² (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, 10542537 + ... + 10566352.

Almost surely, 2^251364650212 is an apocalyptic number.

It is an amenable number.

251364650212 is a deficient number, since it is larger than the sum of its proper divisors (224429730388).

251364650212 is a wasteful number, since it uses less digits than its factorization.

251364650212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21109135 (or 21109133 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 251364650212 in words is "two hundred fifty-one billion, three hundred sixty-four million, six hundred fifty thousand, two hundred twelve".