65025531 has 16 divisors (see below), whose sum is σ = 100523520. Its totient is φ = 41465160.

The previous prime is 65025523. The next prime is 65025557. The reversal of 65025531 is 13552056.

65025531 is a `hidden beast` number, since 650 + 2 + 5 + 5 + 3 + 1 = 666.

It is not a de Polignac number, because 65025531 - 2³ = 65025523 is a prime.

It is a super-2 number, since 2×65025531² = 8456639363663922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 65025495 and 65025504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65025031) 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, 51735 + ... + 52976.

It is an arithmetic number, because the mean of its divisors is an integer number (6282720).

Almost surely, 2^65025531 is an apocalyptic number.

65025531 is a deficient number, since it is larger than the sum of its proper divisors (35497989).

65025531 is a wasteful number, since it uses less digits than its factorization.

65025531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104743 (or 104737 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 65025531 is about 8063.8409582531. The cubic root of 65025531 is about 402.1252116087.

Adding to 65025531 its reverse (13552056), we get a palindrome (78577587).

It can be divided in two parts, 65025 and 531, that added together give a palindrome (65556).

The spelling of 65025531 in words is "sixty-five million, twenty-five thousand, five hundred thirty-one".