51690520131250 has 1728 divisors, whose sum is σ = 146614737056256. Its totient is φ = 13270118400000.

The previous prime is 51690520131221. The next prime is 51690520131259. The reversal of 51690520131250 is 5213102509615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51690520131259) by changing a digit.

It is a polite number, since it can be written in 863 ways as a sum of consecutive naturals, for example, 457438231194 + ... + 457438231306.

It is an arithmetic number, because the mean of its divisors is an integer number (84846491352).

Almost surely, 2^{51690520131250} is an apocalyptic number.

51690520131250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51690520131250 is an abundant number, since it is smaller than the sum of its proper divisors (94924216925006).

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

51690520131250 is a wasteful number, since it uses less digits than its factorization.

51690520131250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 40.

The spelling of 51690520131250 in words is "fifty-one trillion, six hundred ninety billion, five hundred twenty million, one hundred thirty-one thousand, two hundred fifty".