151323191 has 2 divisors, whose sum is σ = 151323192. Its totient is φ = 151323190.

The previous prime is 151323143. The next prime is 151323217. The reversal of 151323191 is 191323151.

It is an a-pointer prime, because the next prime (151323217) can be obtained adding 151323191 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 151323191 - 2²² = 147128887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 151323191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151323101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75661595 + 75661596.

It is an arithmetic number, because the mean of its divisors is an integer number (75661596).

Almost surely, 2^151323191 is an apocalyptic number.

151323191 is a deficient number, since it is larger than the sum of its proper divisors (1).

151323191 is an equidigital number, since it uses as much as digits as its factorization.

151323191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 26.

The square root of 151323191 is about 12301.3491536498. The cubic root of 151323191 is about 532.8870466657.

The spelling of 151323191 in words is "one hundred fifty-one million, three hundred twenty-three thousand, one hundred ninety-one".