231321125 has 32 divisors (see below), whose sum is σ = 349360128. Its totient is φ = 149280000.

The previous prime is 231321121. The next prime is 231321127. The reversal of 231321125 is 521123132.

It is not a de Polignac number, because 231321125 - 2² = 231321121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231321097 and 231321106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231321121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7100 + ... + 22650.

It is an arithmetic number, because the mean of its divisors is an integer number (10917504).

Almost surely, 2^231321125 is an apocalyptic number.

231321125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

231321125 is a deficient number, since it is larger than the sum of its proper divisors (118039003).

231321125 is a wasteful number, since it uses less digits than its factorization.

231321125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15590 (or 15580 counting only the distinct ones).

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

The square root of 231321125 is about 15209.2447215501. The cubic root of 231321125 is about 613.8634350225.

Adding to 231321125 its reverse (521123132), we get a palindrome (752444257).

The spelling of 231321125 in words is "two hundred thirty-one million, three hundred twenty-one thousand, one hundred twenty-five".