53382521 has 4 divisors (see below), whose sum is σ = 53490000. Its totient is φ = 53275044.

The previous prime is 53382509. The next prime is 53382523. The reversal of 53382521 is 12528335.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53382521 - 2¹⁸ = 53120377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53382523) 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, 52991 + ... + 53988.

It is an arithmetic number, because the mean of its divisors is an integer number (13372500).

Almost surely, 2^53382521 is an apocalyptic number.

It is an amenable number.

53382521 is a deficient number, since it is larger than the sum of its proper divisors (107479).

53382521 is a wasteful number, since it uses less digits than its factorization.

53382521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107478.

The product of its digits is 7200, while the sum is 29.

The square root of 53382521 is about 7306.3343066137. The cubic root of 53382521 is about 376.5300944124.

The spelling of 53382521 in words is "fifty-three million, three hundred eighty-two thousand, five hundred twenty-one".