55431654557131 has 16 divisors (see below), whose sum is σ = 57443059396800. Its totient is φ = 53426924587008.

The previous prime is 55431654557129. The next prime is 55431654557159. The reversal of 55431654557131 is 13175545613455.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55431654557131 - 2¹ = 55431654557129 is a prime.

It is a super-2 number, since 2×55431654557131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55431654587131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338475475 + ... + 338639203.

It is an arithmetic number, because the mean of its divisors is an integer number (3590191212300).

Almost surely, 2^{55431654557131} is an apocalyptic number.

55431654557131 is a deficient number, since it is larger than the sum of its proper divisors (2011404839669).

55431654557131 is a wasteful number, since it uses less digits than its factorization.

55431654557131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184038.

The product of its digits is 18900000, while the sum is 55.

The spelling of 55431654557131 in words is "fifty-five trillion, four hundred thirty-one billion, six hundred fifty-four million, five hundred fifty-seven thousand, one hundred thirty-one".