55499684231 has 4 divisors (see below), whose sum is σ = 56259953952. Its totient is φ = 54739414512.

The previous prime is 55499684197. The next prime is 55499684243. The reversal of 55499684231 is 13248699455.

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

It is a cyclic number.

It is not a de Polignac number, because 55499684231 - 2¹⁸ = 55499422087 is a prime.

It is a super-2 number, since 2×55499684231² (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 (55499684291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380134751 + ... + 380134896.

It is an arithmetic number, because the mean of its divisors is an integer number (14064988488).

Almost surely, 2^55499684231 is an apocalyptic number.

55499684231 is a deficient number, since it is larger than the sum of its proper divisors (760269721).

55499684231 is an equidigital number, since it uses as much as digits as its factorization.

55499684231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760269720.

The product of its digits is 9331200, while the sum is 56.

The spelling of 55499684231 in words is "fifty-five billion, four hundred ninety-nine million, six hundred eighty-four thousand, two hundred thirty-one".