65097531 has 12 divisors (see below), whose sum is σ = 95318808. Its totient is φ = 42803424.

The previous prime is 65097517. The next prime is 65097563. The reversal of 65097531 is 13579056.

It is a happy number.

It is not a de Polignac number, because 65097531 - 2¹⁴ = 65081147 is a prime.

It is a super-2 number, since 2×65097531² = 8475377084591922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65097511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48885 + ... + 50198.

It is an arithmetic number, because the mean of its divisors is an integer number (7943234).

Almost surely, 2^65097531 is an apocalyptic number.

65097531 is a deficient number, since it is larger than the sum of its proper divisors (30221277).

65097531 is a wasteful number, since it uses less digits than its factorization.

65097531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99162 (or 99159 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 36.

The square root of 65097531 is about 8068.3040968967. The cubic root of 65097531 is about 402.2735755678.

The spelling of 65097531 in words is "sixty-five million, ninety-seven thousand, five hundred thirty-one".