232015991 has 2 divisors, whose sum is σ = 232015992. Its totient is φ = 232015990.

The previous prime is 232015967. The next prime is 232015999. The reversal of 232015991 is 199510232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 232015991 - 2²² = 227821687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232015999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116007995 + 116007996.

It is an arithmetic number, because the mean of its divisors is an integer number (116007996).

Almost surely, 2^232015991 is an apocalyptic number.

232015991 is a deficient number, since it is larger than the sum of its proper divisors (1).

232015991 is an equidigital number, since it uses as much as digits as its factorization.

232015991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 232015991 is about 15232.0711329747. The cubic root of 232015991 is about 614.4774824618.

It can be divided in two parts, 23201 and 5991, that added together give a palindrome (29192).

The spelling of 232015991 in words is "two hundred thirty-two million, fifteen thousand, nine hundred ninety-one".