55219870631 has 2 divisors, whose sum is σ = 55219870632. Its totient is φ = 55219870630.

The previous prime is 55219870621. The next prime is 55219870729. The reversal of 55219870631 is 13607891255.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55219870631 - 2²⁶ = 55152761767 is a prime.

It is a super-2 number, since 2×55219870631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55219870621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27609935315 + 27609935316.

It is an arithmetic number, because the mean of its divisors is an integer number (27609935316).

Almost surely, 2^55219870631 is an apocalyptic number.

55219870631 is a deficient number, since it is larger than the sum of its proper divisors (1).

55219870631 is an equidigital number, since it uses as much as digits as its factorization.

55219870631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 55219870631 in words is "fifty-five billion, two hundred nineteen million, eight hundred seventy thousand, six hundred thirty-one".