231189151 has 2 divisors, whose sum is σ = 231189152. Its totient is φ = 231189150.

The previous prime is 231189139. The next prime is 231189157. The reversal of 231189151 is 151981132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231189151 - 2¹³ = 231180959 is a prime.

It is equal to p_12704395 and since 231189151 and 12704395 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231189157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115594575 + 115594576.

It is an arithmetic number, because the mean of its divisors is an integer number (115594576).

Almost surely, 2^231189151 is an apocalyptic number.

231189151 is a deficient number, since it is larger than the sum of its proper divisors (1).

231189151 is an equidigital number, since it uses as much as digits as its factorization.

231189151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 31.

The square root of 231189151 is about 15204.9054913209. The cubic root of 231189151 is about 613.7466717645.

The spelling of 231189151 in words is "two hundred thirty-one million, one hundred eighty-nine thousand, one hundred fifty-one".