25497951 has 16 divisors (see below), whose sum is σ = 34713696. Its totient is φ = 16644096.

The previous prime is 25497949. The next prime is 25497973. The reversal of 25497951 is 15979452.

It is not a de Polignac number, because 25497951 - 2¹ = 25497949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25497911) 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, 37551 + ... + 38223.

It is an arithmetic number, because the mean of its divisors is an integer number (2169606).

Almost surely, 2^25497951 is an apocalyptic number.

25497951 is a deficient number, since it is larger than the sum of its proper divisors (9215745).

25497951 is a wasteful number, since it uses less digits than its factorization.

25497951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922.

The product of its digits is 113400, while the sum is 42.

The square root of 25497951 is about 5049.5495838738. The cubic root of 25497951 is about 294.3303819845.

The spelling of 25497951 in words is "twenty-five million, four hundred ninety-seven thousand, nine hundred fifty-one".