65625231 has 32 divisors (see below), whose sum is σ = 104163840. Its totient is φ = 35957376.

The previous prime is 65625199. The next prime is 65625239. The reversal of 65625231 is 13252656.

It is not a de Polignac number, because 65625231 - 2⁵ = 65625199 is a prime.

It is a super-2 number, since 2×65625231² = 8613341887606722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65625239) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 119700 + ... + 120246.

It is an arithmetic number, because the mean of its divisors is an integer number (3255120).

Almost surely, 2^65625231 is an apocalyptic number.

65625231 is a deficient number, since it is larger than the sum of its proper divisors (38538609).

65625231 is a wasteful number, since it uses less digits than its factorization.

65625231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783.

The product of its digits is 10800, while the sum is 30.

The square root of 65625231 is about 8100.9401306268. The cubic root of 65625231 is about 403.3576347780.

Adding to 65625231 its reverse (13252656), we get a palindrome (78877887).

It can be divided in two parts, 65625 and 231, that added together give a palindrome (65856).

The spelling of 65625231 in words is "sixty-five million, six hundred twenty-five thousand, two hundred thirty-one".