55122816 has 64 divisors (see below), whose sum is σ = 167345280. Its totient is φ = 15748608.

The previous prime is 55122787. The next prime is 55122827. The reversal of 55122816 is 61822155.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7566 + ... + 12941.

It is an arithmetic number, because the mean of its divisors is an integer number (2614770).

Almost surely, 2^55122816 is an apocalyptic number.

55122816 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

55122816 is an abundant number, since it is smaller than the sum of its proper divisors (112222464).

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

55122816 is a wasteful number, since it uses less digits than its factorization.

55122816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20531 (or 20519 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 55122816 is about 7424.4741227915. The cubic root of 55122816 is about 380.5781043709.

The spelling of 55122816 in words is "fifty-five million, one hundred twenty-two thousand, eight hundred sixteen".