51212251210 has 16 divisors (see below), whose sum is σ = 92193325056. Its totient is φ = 20482395408.

The previous prime is 51212251199. The next prime is 51212251243. The reversal of 51212251210 is 1215221215.

It is a happy number.

It is a super-2 number, since 2×51212251210² (a number of 22 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, 226122 + ... + 391861.

It is an arithmetic number, because the mean of its divisors is an integer number (5762082816).

Almost surely, 2^51212251210 is an apocalyptic number.

51212251210 is a deficient number, since it is larger than the sum of its proper divisors (40981073846).

51212251210 is a wasteful number, since it uses less digits than its factorization.

51212251210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626277.

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 51212251210 its reverse (1215221215), we get a palindrome (52427472425).

The spelling of 51212251210 in words is "fifty-one billion, two hundred twelve million, two hundred fifty-one thousand, two hundred ten".