51531420055524 has 48 divisors (see below), whose sum is σ = 124408055452800. Its totient is φ = 16581908964096.

The previous prime is 51531420055477. The next prime is 51531420055543. The reversal of 51531420055524 is 42555002413515.

It is a happy number.

It is a super-2 number, since 2×51531420055524² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11034712 + ... + 14994255.

It is an arithmetic number, because the mean of its divisors is an integer number (2591834488600).

Almost surely, 2^{51531420055524} is an apocalyptic number.

It is an amenable number.

51531420055524 is an abundant number, since it is smaller than the sum of its proper divisors (72876635397276).

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

51531420055524 is a wasteful number, since it uses less digits than its factorization.

51531420055524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26034692 (or 26034690 counting only the distinct ones).

The product of its (nonzero) digits is 600000, while the sum is 42.

The spelling of 51531420055524 in words is "fifty-one trillion, five hundred thirty-one billion, four hundred twenty million, fifty-five thousand, five hundred twenty-four".