51138055222580 has 96 divisors (see below), whose sum is σ = 111081990007296. Its totient is φ = 19763510962176.

The previous prime is 51138055222537. The next prime is 51138055222589. The reversal of 51138055222580 is 8522255083115.

It is a super-2 number, since 2×51138055222580² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51138055222589) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100939262 + ... + 101444618.

It is an arithmetic number, because the mean of its divisors is an integer number (1157104062576).

Almost surely, 2^{51138055222580} is an apocalyptic number.

It is an amenable number.

51138055222580 is an abundant number, since it is smaller than the sum of its proper divisors (59943934784716).

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

51138055222580 is a wasteful number, since it uses less digits than its factorization.

51138055222580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506793 (or 506791 counting only the distinct ones).

The product of its (nonzero) digits is 960000, while the sum is 47.

The spelling of 51138055222580 in words is "fifty-one trillion, one hundred thirty-eight billion, fifty-five million, two hundred twenty-two thousand, five hundred eighty".