231330381 has 8 divisors (see below), whose sum is σ = 315003264. Its totient is φ = 150938880.

The previous prime is 231330367. The next prime is 231330383. The reversal of 231330381 is 183033132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231330381 - 2⁵ = 231330349 is a prime.

It is a super-2 number, since 2×231330381² = 107027490347210322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231330383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820180 + ... + 820461.

It is an arithmetic number, because the mean of its divisors is an integer number (39375408).

Almost surely, 2^231330381 is an apocalyptic number.

It is an amenable number.

231330381 is a deficient number, since it is larger than the sum of its proper divisors (83672883).

231330381 is a wasteful number, since it uses less digits than its factorization.

231330381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640691.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 231330381 is about 15209.5490071205. The cubic root of 231330381 is about 613.8716225500.

The spelling of 231330381 in words is "two hundred thirty-one million, three hundred thirty thousand, three hundred eighty-one".