25016231 has 4 divisors (see below), whose sum is σ = 26487792. Its totient is φ = 23544672.

The previous prime is 25016227. The next prime is 25016261. The reversal of 25016231 is 13261052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25016231 - 2² = 25016227 is a prime.

It is a super-2 number, since 2×25016231² = 1251623626890722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25016261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 735755 + ... + 735788.

It is an arithmetic number, because the mean of its divisors is an integer number (6621948).

Almost surely, 2^25016231 is an apocalyptic number.

25016231 is a deficient number, since it is larger than the sum of its proper divisors (1471561).

25016231 is a wasteful number, since it uses less digits than its factorization.

25016231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471560.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 25016231 is about 5001.6228366401. The cubic root of 25016231 is about 292.4650397742.

Adding to 25016231 its reverse (13261052), we get a palindrome (38277283).

The spelling of 25016231 in words is "twenty-five million, sixteen thousand, two hundred thirty-one".