51023021210 has 128 divisors (see below), whose sum is σ = 110690648064. Its totient is φ = 16566612480.

The previous prime is 51023021209. The next prime is 51023021233. The reversal of 51023021210 is 1212032015.

It is a happy number.

It is a super-2 number, since 2×51023021210² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 23697494 + ... + 23699646.

It is an arithmetic number, because the mean of its divisors is an integer number (864770688).

Almost surely, 2^51023021210 is an apocalyptic number.

51023021210 is an abundant number, since it is smaller than the sum of its proper divisors (59667626854).

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

51023021210 is a wasteful number, since it uses less digits than its factorization.

51023021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 51023021210 its reverse (1212032015), we get a palindrome (52235053225).

The spelling of 51023021210 in words is "fifty-one billion, twenty-three million, twenty-one thousand, two hundred ten".