55211858431 has 2 divisors, whose sum is σ = 55211858432. Its totient is φ = 55211858430.

The previous prime is 55211858411. The next prime is 55211858447. The reversal of 55211858431 is 13485811255.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55211858431 - 2¹⁷ = 55211727359 is a prime.

It is a super-2 number, since 2×55211858431² (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 (55211858411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27605929215 + 27605929216.

It is an arithmetic number, because the mean of its divisors is an integer number (27605929216).

Almost surely, 2^55211858431 is an apocalyptic number.

55211858431 is a deficient number, since it is larger than the sum of its proper divisors (1).

55211858431 is an equidigital number, since it uses as much as digits as its factorization.

55211858431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192000, while the sum is 43.

The spelling of 55211858431 in words is "fifty-five billion, two hundred eleven million, eight hundred fifty-eight thousand, four hundred thirty-one".