536215621 has 4 divisors (see below), whose sum is σ = 547624512. Its totient is φ = 524806732.

The previous prime is 536215609. The next prime is 536215639. The reversal of 536215621 is 126512635.

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 a de Polignac number, because none of the positive numbers 2^k-536215621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (536515621) 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, 5704375 + ... + 5704468.

It is an arithmetic number, because the mean of its divisors is an integer number (136906128).

Almost surely, 2^536215621 is an apocalyptic number.

It is an amenable number.

536215621 is a deficient number, since it is larger than the sum of its proper divisors (11408891).

536215621 is a wasteful number, since it uses less digits than its factorization.

536215621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11408890.

The product of its digits is 10800, while the sum is 31.

The square root of 536215621 is about 23156.3300416970. The cubic root of 536215621 is about 812.4185302455.

The spelling of 536215621 in words is "five hundred thirty-six million, two hundred fifteen thousand, six hundred twenty-one".