53321818 has 16 divisors (see below), whose sum is σ = 87468480. Its totient is φ = 24177600.

The previous prime is 53321803. The next prime is 53321833. The reversal of 53321818 is 81812335.

It is an interprime number because it is at equal distance from previous prime (53321803) and next prime (53321833).

It is a self number, because there is not a number n which added to its sum of digits gives 53321818.

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, 6898 + ... + 12418.

It is an arithmetic number, because the mean of its divisors is an integer number (5466780).

Almost surely, 2^53321818 is an apocalyptic number.

53321818 is a deficient number, since it is larger than the sum of its proper divisors (34146662).

53321818 is a wasteful number, since it uses less digits than its factorization.

53321818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5973.

The product of its digits is 5760, while the sum is 31.

The square root of 53321818 is about 7302.1789898632. The cubic root of 53321818 is about 376.3873187435.

The spelling of 53321818 in words is "fifty-three million, three hundred twenty-one thousand, eight hundred eighteen".