230021891 has 8 divisors (see below), whose sum is σ = 259027968. Its totient is φ = 202365000.

The previous prime is 230021887. The next prime is 230021903. The reversal of 230021891 is 198120032.

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 230021891 - 2² = 230021887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 230021891.

It is not an unprimeable number, because it can be changed into a prime (230021791) 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, 336935 + ... + 337616.

It is an arithmetic number, because the mean of its divisors is an integer number (32378496).

Almost surely, 2^230021891 is an apocalyptic number.

230021891 is a deficient number, since it is larger than the sum of its proper divisors (29006077).

230021891 is a wasteful number, since it uses less digits than its factorization.

230021891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674593.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 230021891 is about 15166.4725958279. The cubic root of 230021891 is about 612.7120052438.

The spelling of 230021891 in words is "two hundred thirty million, twenty-one thousand, eight hundred ninety-one".