565520149 has 4 divisors (see below), whose sum is σ = 565694464. Its totient is φ = 565345836.

The previous prime is 565520143. The next prime is 565520167. The reversal of 565520149 is 941025565.

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 565520149 - 2³ = 565520141 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 (565520141) 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, 82197 + ... + 88810.

It is an arithmetic number, because the mean of its divisors is an integer number (141423616).

Almost surely, 2^565520149 is an apocalyptic number.

It is an amenable number.

565520149 is a deficient number, since it is larger than the sum of its proper divisors (174315).

565520149 is a wasteful number, since it uses less digits than its factorization.

565520149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174314.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 565520149 is about 23780.6675474008. The cubic root of 565520149 is about 826.9565555866.

The spelling of 565520149 in words is "five hundred sixty-five million, five hundred twenty thousand, one hundred forty-nine".