55507617231 has 8 divisors (see below), whose sum is σ = 80738352384. Its totient is φ = 33640980120.

The previous prime is 55507617229. The next prime is 55507617257. The reversal of 55507617231 is 13271670555.

55507617231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55507617231 - 2¹ = 55507617229 is a prime.

It is a super-2 number, since 2×55507617231² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55507617281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 841024471 + ... + 841024536.

It is an arithmetic number, because the mean of its divisors is an integer number (10092294048).

Almost surely, 2^55507617231 is an apocalyptic number.

55507617231 is a deficient number, since it is larger than the sum of its proper divisors (25230735153).

55507617231 is a wasteful number, since it uses less digits than its factorization.

55507617231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1682049021.

The product of its (nonzero) digits is 220500, while the sum is 42.

The spelling of 55507617231 in words is "fifty-five billion, five hundred seven million, six hundred seventeen thousand, two hundred thirty-one".