25065531 has 40 divisors (see below), whose sum is σ = 40249440. Its totient is φ = 15489792.

The previous prime is 25065527. The next prime is 25065533. The reversal of 25065531 is 13556052.

25065531 is a `hidden beast` number, since 2 + 5 + 0 + 655 + 3 + 1 = 666.

It is not a de Polignac number, because 25065531 - 2² = 25065527 is a prime.

It is a super-2 number, since 2×25065531² = 1256561688623922, 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 = 25065495 and 25065504.

It is not an unprimeable number, because it can be changed into a prime (25065533) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 150010 + ... + 150176.

It is an arithmetic number, because the mean of its divisors is an integer number (1006236).

Almost surely, 2^25065531 is an apocalyptic number.

25065531 is a deficient number, since it is larger than the sum of its proper divisors (15183909).

25065531 is a wasteful number, since it uses less digits than its factorization.

25065531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 296 counting only the distinct ones).

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

The square root of 25065531 is about 5006.5488113070. The cubic root of 25065531 is about 292.6570359918.

The spelling of 25065531 in words is "twenty-five million, sixty-five thousand, five hundred thirty-one".