25047531 has 12 divisors (see below), whose sum is σ = 36226008. Its totient is φ = 16677024.

The previous prime is 25047527. The next prime is 25047551. The reversal of 25047531 is 13574052.

It is a happy number.

It is not a de Polignac number, because 25047531 - 2² = 25047527 is a prime.

It is a super-2 number, since 2×25047531² = 1254757618391922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25047495 and 25047504.

It is not an unprimeable number, because it can be changed into a prime (25047551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9271 + ... + 11663.

It is an arithmetic number, because the mean of its divisors is an integer number (3018834).

Almost surely, 2^25047531 is an apocalyptic number.

25047531 is a deficient number, since it is larger than the sum of its proper divisors (11178477).

25047531 is a wasteful number, since it uses less digits than its factorization.

25047531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3562 (or 3559 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 25047531 is about 5004.7508429491. The cubic root of 25047531 is about 292.5869651559.

The spelling of 25047531 in words is "twenty-five million, forty-seven thousand, five hundred thirty-one".