53615990 has 16 divisors (see below), whose sum is σ = 100705248. Its totient is φ = 20513856.

The previous prime is 53615963. The next prime is 53616007. The reversal of 53615990 is 9951635.

53615990 = 625² + 626² + ... + 739².

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, 116327 + ... + 116786.

It is an arithmetic number, because the mean of its divisors is an integer number (6294078).

Almost surely, 2^53615990 is an apocalyptic number.

53615990 is a deficient number, since it is larger than the sum of its proper divisors (47089258).

53615990 is a wasteful number, since it uses less digits than its factorization.

53615990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233143.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 53615990 is about 7322.2940394387. The cubic root of 53615990 is about 377.0782155189.

The spelling of 53615990 in words is "fifty-three million, six hundred fifteen thousand, nine hundred ninety".