55125230391 has 48 divisors (see below), whose sum is σ = 99383251968. Its totient is φ = 28604721600.

The previous prime is 55125230389. The next prime is 55125230417. The reversal of 55125230391 is 19303252155.

55125230391 is a `hidden beast` number, since 5 + 512 + 52 + 3 + 0 + 3 + 91 = 666.

It is not a de Polignac number, because 55125230391 - 2¹ = 55125230389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55125230341) 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 47 ways as a sum of consecutive naturals, for example, 587665 + ... + 674981.

It is an arithmetic number, because the mean of its divisors is an integer number (2070484416).

Almost surely, 2^55125230391 is an apocalyptic number.

55125230391 is a deficient number, since it is larger than the sum of its proper divisors (44258021577).

55125230391 is a wasteful number, since it uses less digits than its factorization.

55125230391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88252 (or 88249 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The spelling of 55125230391 in words is "fifty-five billion, one hundred twenty-five million, two hundred thirty thousand, three hundred ninety-one".