53499621 has 24 divisors (see below), whose sum is σ = 83294784. Its totient is φ = 30455040.

The previous prime is 53499617. The next prime is 53499643. The reversal of 53499621 is 12699435.

53499621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53499621 - 2² = 53499617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53499621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53499661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51376 + ... + 52406.

It is an arithmetic number, because the mean of its divisors is an integer number (3470616).

Almost surely, 2^53499621 is an apocalyptic number.

It is an amenable number.

53499621 is a deficient number, since it is larger than the sum of its proper divisors (29795163).

53499621 is a wasteful number, since it uses less digits than its factorization.

53499621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401 (or 1394 counting only the distinct ones).

The product of its digits is 58320, while the sum is 39.

The square root of 53499621 is about 7314.3435112114. The cubic root of 53499621 is about 376.8052123886.

The spelling of 53499621 in words is "fifty-three million, four hundred ninety-nine thousand, six hundred twenty-one".