231646425 has 12 divisors (see below), whose sum is σ = 382988880. Its totient is φ = 123544720.

The previous prime is 231646417. The next prime is 231646427. The reversal of 231646425 is 524646132.

It is not a de Polignac number, because 231646425 - 2³ = 231646417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231646427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1544235 + ... + 1544384.

It is an arithmetic number, because the mean of its divisors is an integer number (31915740).

Almost surely, 2^231646425 is an apocalyptic number.

231646425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231646425 is a deficient number, since it is larger than the sum of its proper divisors (151342455).

231646425 is a wasteful number, since it uses less digits than its factorization.

231646425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3088632 (or 3088627 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 231646425 is about 15219.9351181271. The cubic root of 231646425 is about 614.1510528562.

The spelling of 231646425 in words is "two hundred thirty-one million, six hundred forty-six thousand, four hundred twenty-five".