231120291 has 8 divisors (see below), whose sum is σ = 314717184. Its totient is φ = 150801800.

The previous prime is 231120257. The next prime is 231120293. The reversal of 231120291 is 192021132.

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

It is a cyclic number.

It is not a de Polignac number, because 231120291 - 2¹⁷ = 230989219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231120293) 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, 819435 + ... + 819716.

It is an arithmetic number, because the mean of its divisors is an integer number (39339648).

Almost surely, 2^231120291 is an apocalyptic number.

231120291 is a deficient number, since it is larger than the sum of its proper divisors (83596893).

231120291 is a wasteful number, since it uses less digits than its factorization.

231120291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639201.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 231120291 is about 15202.6409218925. The cubic root of 231120291 is about 613.6857306227.

The spelling of 231120291 in words is "two hundred thirty-one million, one hundred twenty thousand, two hundred ninety-one".