103131565 has 4 divisors (see below), whose sum is σ = 123757884. Its totient is φ = 82505248.

The previous prime is 103131533. The next prime is 103131593. The reversal of 103131565 is 565131301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565131301 = 7 ⋅80733043.

It can be written as a sum of positive squares in 2 ways, for example, as 25180324 + 77951241 = 5018^2 + 8829^2 .

It is a cyclic number.

It is not a de Polignac number, because 103131565 - 2⁵ = 103131533 is a prime.

It is a super-2 number, since 2×103131565² = 21272239398698450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10313152 + ... + 10313161.

It is an arithmetic number, because the mean of its divisors is an integer number (30939471).

Almost surely, 2^103131565 is an apocalyptic number.

It is an amenable number.

103131565 is a deficient number, since it is larger than the sum of its proper divisors (20626319).

103131565 is an equidigital number, since it uses as much as digits as its factorization.

103131565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20626318.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 103131565 is about 10155.3712389060. The cubic root of 103131565 is about 468.9543147247.

Adding to 103131565 its reverse (565131301), we get a palindrome (668262866).

The spelling of 103131565 in words is "one hundred three million, one hundred thirty-one thousand, five hundred sixty-five".