25162231 has 4 divisors (see below), whose sum is σ = 25411464. Its totient is φ = 24913000.

The previous prime is 25162229. The next prime is 25162237. The reversal of 25162231 is 13226152.

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 25162231 - 2¹ = 25162229 is a prime.

It is a super-2 number, since 2×25162231² = 1266275737794722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25162237) 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, 124465 + ... + 124666.

It is an arithmetic number, because the mean of its divisors is an integer number (6352866).

Almost surely, 2^25162231 is an apocalyptic number.

25162231 is a deficient number, since it is larger than the sum of its proper divisors (249233).

25162231 is a wasteful number, since it uses less digits than its factorization.

25162231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249232.

The product of its digits is 720, while the sum is 22.

The square root of 25162231 is about 5016.1968661527. The cubic root of 25162231 is about 293.0328990382.

Adding to 25162231 its reverse (13226152), we get a palindrome (38388383).

The spelling of 25162231 in words is "twenty-five million, one hundred sixty-two thousand, two hundred thirty-one".