55981948831 has 2 divisors, whose sum is σ = 55981948832. Its totient is φ = 55981948830.

The previous prime is 55981948819. The next prime is 55981948843. The reversal of 55981948831 is 13884918955.

It is a balanced prime because it is at equal distance from previous prime (55981948819) and next prime (55981948843).

It is a cyclic number.

It is not a de Polignac number, because 55981948831 - 2¹³ = 55981940639 is a prime.

It is a super-2 number, since 2×55981948831² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55981948831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55981948861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27990974415 + 27990974416.

It is an arithmetic number, because the mean of its divisors is an integer number (27990974416).

Almost surely, 2^55981948831 is an apocalyptic number.

55981948831 is a deficient number, since it is larger than the sum of its proper divisors (1).

55981948831 is an equidigital number, since it uses as much as digits as its factorization.

55981948831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12441600, while the sum is 61.

The spelling of 55981948831 in words is "fifty-five billion, nine hundred eighty-one million, nine hundred forty-eight thousand, eight hundred thirty-one".