55564532531 has 2 divisors, whose sum is σ = 55564532532. Its totient is φ = 55564532530.

The previous prime is 55564532509. The next prime is 55564532549. The reversal of 55564532531 is 13523546555.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55564532531 is a prime.

It is a super-2 number, since 2×55564532531² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55564532431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27782266265 + 27782266266.

It is an arithmetic number, because the mean of its divisors is an integer number (27782266266).

Almost surely, 2^55564532531 is an apocalyptic number.

55564532531 is a deficient number, since it is larger than the sum of its proper divisors (1).

55564532531 is an equidigital number, since it uses as much as digits as its factorization.

55564532531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350000, while the sum is 44.

The spelling of 55564532531 in words is "fifty-five billion, five hundred sixty-four million, five hundred thirty-two thousand, five hundred thirty-one".