55122918 has 8 divisors (see below), whose sum is σ = 110245848. Its totient is φ = 18374304.

The previous prime is 55122917. The next prime is 55122919. The reversal of 55122918 is 81922155.

It is an interprime number because it is at equal distance from previous prime (55122917) and next prime (55122919).

It is a sphenic number, since it is the product of 3 distinct primes.

55122918 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55122913) 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, 4593571 + ... + 4593582.

It is an arithmetic number, because the mean of its divisors is an integer number (13780731).

Almost surely, 2^55122918 is an apocalyptic number.

55122918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55122918 is a wasteful number, since it uses less digits than its factorization.

55122918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9187158.

The product of its digits is 7200, while the sum is 33.

The square root of 55122918 is about 7424.4809919617. The cubic root of 55122918 is about 380.5783391130.

The spelling of 55122918 in words is "fifty-five million, one hundred twenty-two thousand, nine hundred eighteen".