230220391 has 2 divisors, whose sum is σ = 230220392. Its totient is φ = 230220390.

The previous prime is 230220379. The next prime is 230220407. The reversal of 230220391 is 193022032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 230220391 - 2¹⁷ = 230089319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230220491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115110195 + 115110196.

It is an arithmetic number, because the mean of its divisors is an integer number (115110196).

Almost surely, 2^230220391 is an apocalyptic number.

230220391 is a deficient number, since it is larger than the sum of its proper divisors (1).

230220391 is an equidigital number, since it uses as much as digits as its factorization.

230220391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 230220391 is about 15173.0152244041. The cubic root of 230220391 is about 612.8882034945. Note that the first 3 decimals are identical.

The spelling of 230220391 in words is "two hundred thirty million, two hundred twenty thousand, three hundred ninety-one".