55431162097 has 4 divisors (see below), whose sum is σ = 55498028020. Its totient is φ = 55364296176.

The previous prime is 55431162091. The next prime is 55431162109. The reversal of 55431162097 is 79026113455.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48558088881 + 6873073216 = 220359^2 + 82904^2 .

It is a cyclic number.

It is not a de Polignac number, because 55431162097 - 2¹⁵ = 55431129329 is a prime.

It is a super-2 number, since 2×55431162097² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55431162091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33431718 + ... + 33433375.

It is an arithmetic number, because the mean of its divisors is an integer number (13874507005).

Almost surely, 2^55431162097 is an apocalyptic number.

It is an amenable number.

55431162097 is a deficient number, since it is larger than the sum of its proper divisors (66865923).

55431162097 is an equidigital number, since it uses as much as digits as its factorization.

55431162097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66865922.

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 55431162097 in words is "fifty-five billion, four hundred thirty-one million, one hundred sixty-two thousand, ninety-seven".