65135931 has 16 divisors (see below), whose sum is σ = 103570944. Its totient is φ = 35601984.

The previous prime is 65135923. The next prime is 65135953. The reversal of 65135931 is 13953156.

It is not a de Polignac number, because 65135931 - 2³ = 65135923 is a prime.

It is a super-2 number, since 2×65135931² = 8485379014473522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 65135892 and 65135901.

It is not an unprimeable number, because it can be changed into a prime (65135731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66946 + ... + 67911.

It is an arithmetic number, because the mean of its divisors is an integer number (6473184).

Almost surely, 2^65135931 is an apocalyptic number.

65135931 is a deficient number, since it is larger than the sum of its proper divisors (38435013).

65135931 is a wasteful number, since it uses less digits than its factorization.

65135931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134890.

The product of its digits is 12150, while the sum is 33.

The square root of 65135931 is about 8070.6834283101. The cubic root of 65135931 is about 402.3526582851.

It can be divided in two parts, 65135 and 931, that added together give a palindrome (66066).

The spelling of 65135931 in words is "sixty-five million, one hundred thirty-five thousand, nine hundred thirty-one".