232381561 has 2 divisors, whose sum is σ = 232381562. Its totient is φ = 232381560.

The previous prime is 232381547. The next prime is 232381603. The reversal of 232381561 is 165183232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232379536 + 2025 = 15244^2 + 45^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232381561 is a prime.

It is not a weakly prime, because it can be changed into another prime (232381511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116190780 + 116190781.

It is an arithmetic number, because the mean of its divisors is an integer number (116190781).

Almost surely, 2^232381561 is an apocalyptic number.

It is an amenable number.

232381561 is a deficient number, since it is larger than the sum of its proper divisors (1).

232381561 is an equidigital number, since it uses as much as digits as its factorization.

232381561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 232381561 is about 15244.0664194302. The cubic root of 232381561 is about 614.8000416319.

The spelling of 232381561 in words is "two hundred thirty-two million, three hundred eighty-one thousand, five hundred sixty-one".