55001031997 has 2 divisors, whose sum is σ = 55001031998. Its totient is φ = 55001031996.

The previous prime is 55001031959. The next prime is 55001032027. The reversal of 55001031997 is 79913010055.

55001031997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41294710521 + 13706321476 = 203211^2 + 117074^2 .

It is a cyclic number.

It is not a de Polignac number, because 55001031997 - 2¹¹ = 55001029949 is a prime.

It is a super-2 number, since 2×55001031997² (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 (55001031097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27500515998 + 27500515999.

It is an arithmetic number, because the mean of its divisors is an integer number (27500515999).

Almost surely, 2^55001031997 is an apocalyptic number.

It is an amenable number.

55001031997 is a deficient number, since it is larger than the sum of its proper divisors (1).

55001031997 is an equidigital number, since it uses as much as digits as its factorization.

55001031997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42525, while the sum is 40.

The spelling of 55001031997 in words is "fifty-five billion, one million, thirty-one thousand, nine hundred ninety-seven".