51331056514542 has 24 divisors (see below), whose sum is σ = 127105473274416. Its totient is φ = 14666016146976.

The previous prime is 51331056514541. The next prime is 51331056514547. The reversal of 51331056514542 is 24541565013315.

It is a happy number.

51331056514542 is a `hidden beast` number, since 5 + 1 + 3 + 3 + 1 + 0 + 56 + 51 + 4 + 542 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51331056514541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 203694668583 + ... + 203694668834.

It is an arithmetic number, because the mean of its divisors is an integer number (5296061386434).

Almost surely, 2^{51331056514542} is an apocalyptic number.

51331056514542 is an abundant number, since it is smaller than the sum of its proper divisors (75774416759874).

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

51331056514542 is a wasteful number, since it uses less digits than its factorization.

51331056514542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407389337432 (or 407389337429 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 45.

The spelling of 51331056514542 in words is "fifty-one trillion, three hundred thirty-one billion, fifty-six million, five hundred fourteen thousand, five hundred forty-two".