231975140 has 12 divisors (see below), whose sum is σ = 487147836. Its totient is φ = 92790048.

The previous prime is 231975137. The next prime is 231975143. The reversal of 231975140 is 41579132.

It is an interprime number because it is at equal distance from previous prime (231975137) and next prime (231975143).

It can be written as a sum of positive squares in 2 ways, for example, as 58736896 + 173238244 = 7664^2 + 13162^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231975097 and 231975106.

It is not an unprimeable number, because it can be changed into a prime (231975143) 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, 5799359 + ... + 5799398.

It is an arithmetic number, because the mean of its divisors is an integer number (40595653).

Almost surely, 2^231975140 is an apocalyptic number.

231975140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231975140 is an abundant number, since it is smaller than the sum of its proper divisors (255172696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231975140 is a wasteful number, since it uses less digits than its factorization.

231975140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11598766 (or 11598764 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 231975140 is about 15230.7301203849. The cubic root of 231975140 is about 614.4414167106.

The spelling of 231975140 in words is "two hundred thirty-one million, nine hundred seventy-five thousand, one hundred forty".