55231111907 has 4 divisors (see below), whose sum is σ = 55561837296. Its totient is φ = 54900386520.

The previous prime is 55231111883. The next prime is 55231111933. The reversal of 55231111907 is 70911113255.

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 55231111907 - 2²⁰ = 55230063331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55231111937) 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, 165362444 + ... + 165362777.

It is an arithmetic number, because the mean of its divisors is an integer number (13890459324).

Almost surely, 2^55231111907 is an apocalyptic number.

55231111907 is a deficient number, since it is larger than the sum of its proper divisors (330725389).

55231111907 is a wasteful number, since it uses less digits than its factorization.

55231111907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330725388.

The product of its (nonzero) digits is 9450, while the sum is 35.

The spelling of 55231111907 in words is "fifty-five billion, two hundred thirty-one million, one hundred eleven thousand, nine hundred seven".