25723251 has 24 divisors (see below), whose sum is σ = 39587184. Its totient is φ = 16679520.

The previous prime is 25723219. The next prime is 25723253. The reversal of 25723251 is 15232752.

It is not a de Polignac number, because 25723251 - 2⁵ = 25723219 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (25723253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7561 + ... + 10421.

It is an arithmetic number, because the mean of its divisors is an integer number (1649466).

Almost surely, 2^25723251 is an apocalyptic number.

25723251 is a deficient number, since it is larger than the sum of its proper divisors (13863933).

25723251 is an equidigital number, since it uses as much as digits as its factorization.

25723251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2913 (or 2901 counting only the distinct ones).

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

The square root of 25723251 is about 5071.8094404266. The cubic root of 25723251 is about 295.1947426190.

The spelling of 25723251 in words is "twenty-five million, seven hundred twenty-three thousand, two hundred fifty-one".