565501131 has 24 divisors (see below), whose sum is σ = 910007280. Its totient is φ = 335998656.

The previous prime is 565501129. The next prime is 565501147. The reversal of 565501131 is 131105565.

565501131 is a `hidden beast` number, since 5 + 655 + 0 + 1 + 1 + 3 + 1 = 666.

It is not a de Polignac number, because 565501131 - 2¹ = 565501129 is a prime.

It is a super-2 number, since 2×565501131² = 639583058324558322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 565501095 and 565501104.

It is not an unprimeable number, because it can be changed into a prime (565501331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79941 + ... + 86726.

It is an arithmetic number, because the mean of its divisors is an integer number (37916970).

Almost surely, 2^565501131 is an apocalyptic number.

565501131 is a deficient number, since it is larger than the sum of its proper divisors (344506149).

565501131 is a wasteful number, since it uses less digits than its factorization.

565501131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166715 (or 166712 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 565501131 is about 23780.2676814202. The cubic root of 565501131 is about 826.9472855155.

Adding to 565501131 its reverse (131105565), we get a palindrome (696606696).

The spelling of 565501131 in words is "five hundred sixty-five million, five hundred one thousand, one hundred thirty-one".