232061581 has 2 divisors, whose sum is σ = 232061582. Its totient is φ = 232061580.

The previous prime is 232061579. The next prime is 232061597. The reversal of 232061581 is 185160232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207648100 + 24413481 = 14410^2 + 4941^2 .

It is a cyclic number.

It is not a de Polignac number, because 232061581 - 2¹ = 232061579 is a prime.

It is a super-2 number, since 2×232061581² = 107705154752439122, which contains 22 as substring.

Together with 232061579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232041581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116030790 + 116030791.

It is an arithmetic number, because the mean of its divisors is an integer number (116030791).

Almost surely, 2^232061581 is an apocalyptic number.

It is an amenable number.

232061581 is a deficient number, since it is larger than the sum of its proper divisors (1).

232061581 is an equidigital number, since it uses as much as digits as its factorization.

232061581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 232061581 is about 15233.5675729620. The cubic root of 232061581 is about 614.5177270927.

The spelling of 232061581 in words is "two hundred thirty-two million, sixty-one thousand, five hundred eighty-one".