65506231 has 16 divisors (see below), whose sum is σ = 78478848. Its totient is φ = 53460000.

The previous prime is 65506229. The next prime is 65506237. The reversal of 65506231 is 13260556.

It is a cyclic number.

It is not a de Polignac number, because 65506231 - 2¹ = 65506229 is a prime.

It is a super-2 number, since 2×65506231² = 8582132599650722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 65506231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65506237) 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, 39601 + ... + 41221.

It is an arithmetic number, because the mean of its divisors is an integer number (4904928).

Almost surely, 2^65506231 is an apocalyptic number.

65506231 is a deficient number, since it is larger than the sum of its proper divisors (12972617).

65506231 is a wasteful number, since it uses less digits than its factorization.

65506231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 65506231 is about 8093.5919714302. The cubic root of 65506231 is about 403.1136808392.

Adding to 65506231 its reverse (13260556), we get a palindrome (78766787).

The spelling of 65506231 in words is "sixty-five million, five hundred six thousand, two hundred thirty-one".