53815990 has 8 divisors (see below), whose sum is σ = 96868800. Its totient is φ = 21526392.

The previous prime is 53815981. The next prime is 53815991. The reversal of 53815990 is 9951835.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53815991) 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, 2690790 + ... + 2690809.

It is an arithmetic number, because the mean of its divisors is an integer number (12108600).

Almost surely, 2^53815990 is an apocalyptic number.

53815990 is a deficient number, since it is larger than the sum of its proper divisors (43052810).

53815990 is a wasteful number, since it uses less digits than its factorization.

53815990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5381606.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 53815990 is about 7335.9382494675. The cubic root of 53815990 is about 377.5464966192.

The spelling of 53815990 in words is "fifty-three million, eight hundred fifteen thousand, nine hundred ninety".