55021516 has 24 divisors (see below), whose sum is σ = 107883216. Its totient is φ = 24333120.

The previous prime is 55021513. The next prime is 55021523. The reversal of 55021516 is 61512055.

It is not an unprimeable number, because it can be changed into a prime (55021513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15271 + ... + 18526.

It is an arithmetic number, because the mean of its divisors is an integer number (4495134).

Almost surely, 2^55021516 is an apocalyptic number.

It is an amenable number.

55021516 is a deficient number, since it is larger than the sum of its proper divisors (52861700).

55021516 is a wasteful number, since it uses less digits than its factorization.

55021516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33849 (or 33847 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 55021516 is about 7417.6489536780. The cubic root of 55021516 is about 380.3448301110.

The spelling of 55021516 in words is "fifty-five million, twenty-one thousand, five hundred sixteen".