25147231 has 8 divisors (see below), whose sum is σ = 26023424. Its totient is φ = 24275160.

The previous prime is 25147229. The next prime is 25147249. The reversal of 25147231 is 13274152.

It is a happy number.

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 25147231 - 2¹ = 25147229 is a prime.

It is a super-2 number, since 2×25147231² = 1264766453934722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25147196 and 25147205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25147261) 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, 16216 + ... + 17698.

It is an arithmetic number, because the mean of its divisors is an integer number (3252928).

Almost surely, 2^25147231 is an apocalyptic number.

25147231 is a deficient number, since it is larger than the sum of its proper divisors (876193).

25147231 is a wasteful number, since it uses less digits than its factorization.

25147231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061.

The product of its digits is 1680, while the sum is 25.

The square root of 25147231 is about 5014.7014866291. The cubic root of 25147231 is about 292.9746587440.

The spelling of 25147231 in words is "twenty-five million, one hundred forty-seven thousand, two hundred thirty-one".