232571661 has 16 divisors (see below), whose sum is σ = 355227264. Its totient is φ = 132585984.

The previous prime is 232571629. The next prime is 232571681. The reversal of 232571661 is 166175232.

It is not a de Polignac number, because 232571661 - 2⁵ = 232571629 is a prime.

It is a super-3 number, since 3×232571661³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232571621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3696 + ... + 21881.

It is an arithmetic number, because the mean of its divisors is an integer number (22201704).

Almost surely, 2^232571661 is an apocalyptic number.

232571661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

232571661 is a deficient number, since it is larger than the sum of its proper divisors (122655603).

232571661 is a wasteful number, since it uses less digits than its factorization.

232571661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26020.

The product of its digits is 15120, while the sum is 33.

The square root of 232571661 is about 15250.3003576979. The cubic root of 232571661 is about 614.9676418959.

The spelling of 232571661 in words is "two hundred thirty-two million, five hundred seventy-one thousand, six hundred sixty-one".