55515685031 has 4 divisors (see below), whose sum is σ = 55516230552. Its totient is φ = 55515139512.

The previous prime is 55515685009. The next prime is 55515685037. The reversal of 55515685031 is 13058651555.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55515685031 is a prime.

It is a super-2 number, since 2×55515685031² (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 (55515685037) 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, 69740 + ... + 340433.

It is an arithmetic number, because the mean of its divisors is an integer number (13879057638).

Almost surely, 2^55515685031 is an apocalyptic number.

55515685031 is a deficient number, since it is larger than the sum of its proper divisors (545521).

55515685031 is a wasteful number, since it uses less digits than its factorization.

55515685031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545520.

The product of its (nonzero) digits is 450000, while the sum is 44.

The spelling of 55515685031 in words is "fifty-five billion, five hundred fifteen million, six hundred eighty-five thousand, thirty-one".