231733365829681 has 3 divisors (see below), whose sum is σ = 231733381052473. Its totient is φ = 231733350606890.

The previous prime is 231733365829661. The next prime is 231733365829687. The reversal of 231733365829681 is 186928563337132.

The square root of 231733365829681 is 15222791.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 231733365829681 - 2¹⁷ = 231733365698609 is a prime.

It is a super-2 number, since 2×231733365829681² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231733365829687) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7611396 + ... + 22834186.

Almost surely, 2^{231733365829681} is an apocalyptic number.

231733365829681 is the 15222791-st square number.

231733365829681 is the 7611396-th centered octagonal number.

It is an amenable number.

231733365829681 is a deficient number, since it is larger than the sum of its proper divisors (15222792).

231733365829681 is an frugal number, since it uses more digits than its factorization.

231733365829681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30445582 (or 15222791 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 67.

The spelling of 231733365829681 in words is "two hundred thirty-one trillion, seven hundred thirty-three billion, three hundred sixty-five million, eight hundred twenty-nine thousand, six hundred eighty-one".