25365531 has 8 divisors (see below), whose sum is σ = 34297344. Its totient is φ = 16672040.

The previous prime is 25365503. The next prime is 25365541. The reversal of 25365531 is 13556352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25365531 - 2¹⁴ = 25349147 is a prime.

It is a super-2 number, since 2×25365531² = 1286820325823922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25365541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59331 + ... + 59756.

It is an arithmetic number, because the mean of its divisors is an integer number (4287168).

Almost surely, 2^25365531 is an apocalyptic number.

25365531 is a deficient number, since it is larger than the sum of its proper divisors (8931813).

25365531 is a wasteful number, since it uses less digits than its factorization.

25365531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119161.

The product of its digits is 13500, while the sum is 30.

The square root of 25365531 is about 5036.4204550454. The cubic root of 25365531 is about 293.8199763274.

The spelling of 25365531 in words is "twenty-five million, three hundred sixty-five thousand, five hundred thirty-one".