230191421 has 2 divisors, whose sum is σ = 230191422. Its totient is φ = 230191420.

The previous prime is 230191397. The next prime is 230191439. The reversal of 230191421 is 124191032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209815225 + 20376196 = 14485^2 + 4514^2 .

It is a cyclic number.

It is not a de Polignac number, because 230191421 - 2¹⁰ = 230190397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230191471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115095710 + 115095711.

It is an arithmetic number, because the mean of its divisors is an integer number (115095711).

Almost surely, 2^230191421 is an apocalyptic number.

It is an amenable number.

230191421 is a deficient number, since it is larger than the sum of its proper divisors (1).

230191421 is an equidigital number, since it uses as much as digits as its factorization.

230191421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 230191421 is about 15172.0605390303. The cubic root of 230191421 is about 612.8624946277.

The spelling of 230191421 in words is "two hundred thirty million, one hundred ninety-one thousand, four hundred twenty-one".