53199631 has 4 divisors (see below), whose sum is σ = 53239752. Its totient is φ = 53159512.

The previous prime is 53199617. The next prime is 53199649. The reversal of 53199631 is 13699135.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53199631 - 2⁹ = 53199119 is a prime.

It is a super-2 number, since 2×53199631² = 5660401477072322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53199691) 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, 18001 + ... + 20746.

It is an arithmetic number, because the mean of its divisors is an integer number (13309938).

Almost surely, 2^53199631 is an apocalyptic number.

53199631 is a deficient number, since it is larger than the sum of its proper divisors (40121).

53199631 is a wasteful number, since it uses less digits than its factorization.

53199631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40120.

The product of its digits is 21870, while the sum is 37.

The square root of 53199631 is about 7293.8077161384. The cubic root of 53199631 is about 376.0996015559.

The spelling of 53199631 in words is "fifty-three million, one hundred ninety-nine thousand, six hundred thirty-one".