231656425 has 48 divisors (see below), whose sum is σ = 385725312. Its totient is φ = 133286400.

The previous prime is 231656423. The next prime is 231656429. The reversal of 231656425 is 524656132.

It is not a de Polignac number, because 231656425 - 2¹ = 231656423 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231656423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20397 + ... + 29653.

It is an arithmetic number, because the mean of its divisors is an integer number (8035944).

Almost surely, 2^231656425 is an apocalyptic number.

231656425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231656425 is a deficient number, since it is larger than the sum of its proper divisors (154068887).

231656425 is a wasteful number, since it uses less digits than its factorization.

231656425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9298 (or 9293 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 231656425 is about 15220.2636310939. The cubic root of 231656425 is about 614.1598902070.

It can be divided in two parts, 231 and 656425, that added together give a palindrome (656656).

The spelling of 231656425 in words is "two hundred thirty-one million, six hundred fifty-six thousand, four hundred twenty-five".