55422993 has 4 divisors (see below), whose sum is σ = 73897328. Its totient is φ = 36948660.

The previous prime is 55422989. The next prime is 55423013. The reversal of 55422993 is 39922455.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55422993 - 2² = 55422989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55422923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9237163 + ... + 9237168.

It is an arithmetic number, because the mean of its divisors is an integer number (18474332).

Almost surely, 2^55422993 is an apocalyptic number.

It is an amenable number.

55422993 is a deficient number, since it is larger than the sum of its proper divisors (18474335).

55422993 is a wasteful number, since it uses less digits than its factorization.

55422993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18474334.

The product of its digits is 97200, while the sum is 39.

The square root of 55422993 is about 7444.6620474001. The cubic root of 55422993 is about 381.2676799828.

The spelling of 55422993 in words is "fifty-five million, four hundred twenty-two thousand, nine hundred ninety-three".