55531324531 has 2 divisors, whose sum is σ = 55531324532. Its totient is φ = 55531324530.

The previous prime is 55531324489. The next prime is 55531324547. The reversal of 55531324531 is 13542313555.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55531324531 is a prime.

It is a super-2 number, since 2×55531324531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55531324231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27765662265 + 27765662266.

It is an arithmetic number, because the mean of its divisors is an integer number (27765662266).

Almost surely, 2^55531324531 is an apocalyptic number.

55531324531 is a deficient number, since it is larger than the sum of its proper divisors (1).

55531324531 is an equidigital number, since it uses as much as digits as its factorization.

55531324531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 135000, while the sum is 37.

The spelling of 55531324531 in words is "fifty-five billion, five hundred thirty-one million, three hundred twenty-four thousand, five hundred thirty-one".