55220542051 has 4 divisors (see below), whose sum is σ = 55290708712. Its totient is φ = 55150375392.

The previous prime is 55220542031. The next prime is 55220542057. The reversal of 55220542051 is 15024502255.

It is a happy number.

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 55220542051 - 2⁹ = 55220541539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55220542057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35082150 + ... + 35083723.

It is an arithmetic number, because the mean of its divisors is an integer number (13822677178).

Almost surely, 2^55220542051 is an apocalyptic number.

55220542051 is a deficient number, since it is larger than the sum of its proper divisors (70166661).

55220542051 is an equidigital number, since it uses as much as digits as its factorization.

55220542051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70166660.

The product of its (nonzero) digits is 20000, while the sum is 31.

The spelling of 55220542051 in words is "fifty-five billion, two hundred twenty million, five hundred forty-two thousand, fifty-one".