55388492931 has 16 divisors (see below), whose sum is σ = 79859257344. Its totient is φ = 34014125184.

The previous prime is 55388492911. The next prime is 55388492933. The reversal of 55388492931 is 13929488355.

It is a happy number.

It is not a de Polignac number, because 55388492931 - 2⁶ = 55388492867 is a prime.

It is a super-2 number, since 2×55388492931² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55388492933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11551315 + ... + 11556108.

It is an arithmetic number, because the mean of its divisors is an integer number (4991203584).

Almost surely, 2^55388492931 is an apocalyptic number.

55388492931 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

55388492931 is a deficient number, since it is larger than the sum of its proper divisors (24470764413).

55388492931 is a wasteful number, since it uses less digits than its factorization.

55388492931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23107490.

The product of its digits is 9331200, while the sum is 57.

The spelling of 55388492931 in words is "fifty-five billion, three hundred eighty-eight million, four hundred ninety-two thousand, nine hundred thirty-one".