231121425 has 36 divisors (see below), whose sum is σ = 392901936. Its totient is φ = 119880000.

The previous prime is 231121417. The next prime is 231121447. The reversal of 231121425 is 524121132.

It is not a de Polignac number, because 231121425 - 2³ = 231121417 is a prime.

It is a super-2 number, since 2×231121425² = 106834226188061250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 101550 + ... + 103800.

Almost surely, 2^231121425 is an apocalyptic number.

231121425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231121425 is a deficient number, since it is larger than the sum of its proper divisors (161780511).

231121425 is a wasteful number, since it uses less digits than its factorization.

231121425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338 (or 2296 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 231121425 is about 15202.6782179983. The cubic root of 231121425 is about 613.6867343114.

Adding to 231121425 its reverse (524121132), we get a palindrome (755242557).

The spelling of 231121425 in words is "two hundred thirty-one million, one hundred twenty-one thousand, four hundred twenty-five".