232135681 has 4 divisors (see below), whose sum is σ = 233107200. Its totient is φ = 231164164.

The previous prime is 232135667. The next prime is 232135703. The reversal of 232135681 is 186531232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232135681 is a prime.

It is a super-2 number, since 2×232135681² = 107773948786667522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (232135661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 485401 + ... + 485878.

It is an arithmetic number, because the mean of its divisors is an integer number (58276800).

Almost surely, 2^232135681 is an apocalyptic number.

It is an amenable number.

232135681 is a deficient number, since it is larger than the sum of its proper divisors (971519).

232135681 is an equidigital number, since it uses as much as digits as its factorization.

232135681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971518.

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

The square root of 232135681 is about 15235.9995077448. Note that the first 3 decimals coincide. The cubic root of 232135681 is about 614.5831277183.

The spelling of 232135681 in words is "two hundred thirty-two million, one hundred thirty-five thousand, six hundred eighty-one".