232131987 has 20 divisors (see below), whose sum is σ = 365018280. Its totient is φ = 146608704.

The previous prime is 232131983. The next prime is 232132001. The reversal of 232131987 is 789131232.

It is not a de Polignac number, because 232131987 - 2² = 232131983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (232131983) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 73878 + ... + 76955.

It is an arithmetic number, because the mean of its divisors is an integer number (18250914).

Almost surely, 2^232131987 is an apocalyptic number.

232131987 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

232131987 is a deficient number, since it is larger than the sum of its proper divisors (132886293).

232131987 is a wasteful number, since it uses less digits than its factorization.

232131987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150864 (or 150855 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 232131987 is about 15235.8782812150. The cubic root of 232131987 is about 614.5798677252.

It can be divided in two parts, 2321319 and 87, that multiplied together give a triangular number (201954753 = T₂₀₀₉₇).

The spelling of 232131987 in words is "two hundred thirty-two million, one hundred thirty-one thousand, nine hundred eighty-seven".