565213901 has 4 divisors (see below), whose sum is σ = 645958752. Its totient is φ = 484469052.

The previous prime is 565213897. The next prime is 565213927. The reversal of 565213901 is 109312565.

565213901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 109312565 = 5 ⋅21862513.

It is a cyclic number.

It is not a de Polignac number, because 565213901 - 2² = 565213897 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 (565213951) 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, 40372415 + ... + 40372428.

It is an arithmetic number, because the mean of its divisors is an integer number (161489688).

Almost surely, 2^565213901 is an apocalyptic number.

It is an amenable number.

565213901 is a deficient number, since it is larger than the sum of its proper divisors (80744851).

565213901 is an equidigital number, since it uses as much as digits as its factorization.

565213901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80744850.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 565213901 is about 23774.2276635856. The cubic root of 565213901 is about 826.8072537916.

The spelling of 565213901 in words is "five hundred sixty-five million, two hundred thirteen thousand, nine hundred one".