231738881 has 16 divisors (see below), whose sum is σ = 260430720. Its totient is φ = 204353280.

The previous prime is 231738841. The next prime is 231738967. The reversal of 231738881 is 188837132.

It is a cyclic number.

It is not a de Polignac number, because 231738881 - 2¹⁴ = 231722497 is a prime.

It is a super-2 number, since 2×231738881² = 107405817934264322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231738821) 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, 178025 + ... + 179321.

It is an arithmetic number, because the mean of its divisors is an integer number (16276920).

Almost surely, 2^231738881 is an apocalyptic number.

It is an amenable number.

231738881 is a deficient number, since it is larger than the sum of its proper divisors (28691839).

231738881 is a wasteful number, since it uses less digits than its factorization.

231738881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784.

The product of its digits is 64512, while the sum is 41.

The square root of 231738881 is about 15222.9721473830. The cubic root of 231738881 is about 614.2327497743.

The spelling of 231738881 in words is "two hundred thirty-one million, seven hundred thirty-eight thousand, eight hundred eighty-one".