55115731031 has 4 divisors (see below), whose sum is σ = 58016559000. Its totient is φ = 52214903064.

The previous prime is 55115731003. The next prime is 55115731037. The reversal of 55115731031 is 13013751155.

55115731031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55115731031 is a prime.

It is a super-2 number, since 2×55115731031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55115731037) 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, 1450413956 + ... + 1450413993.

It is an arithmetic number, because the mean of its divisors is an integer number (14504139750).

Almost surely, 2^55115731031 is an apocalyptic number.

55115731031 is a deficient number, since it is larger than the sum of its proper divisors (2900827969).

55115731031 is a wasteful number, since it uses less digits than its factorization.

55115731031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900827968.

The product of its (nonzero) digits is 7875, while the sum is 32.

The spelling of 55115731031 in words is "fifty-five billion, one hundred fifteen million, seven hundred thirty-one thousand, thirty-one".