151644191 has 2 divisors, whose sum is σ = 151644192. Its totient is φ = 151644190.

The previous prime is 151644151. The next prime is 151644193. The reversal of 151644191 is 191446151.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151644191 is a prime.

It is a Sophie Germain prime.

Together with 151644193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151644193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75822095 + 75822096.

It is an arithmetic number, because the mean of its divisors is an integer number (75822096).

Almost surely, 2^151644191 is an apocalyptic number.

151644191 is a deficient number, since it is larger than the sum of its proper divisors (1).

151644191 is an equidigital number, since it uses as much as digits as its factorization.

151644191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 32.

The square root of 151644191 is about 12314.3895910435. The cubic root of 151644191 is about 533.2635827619.

The spelling of 151644191 in words is "one hundred fifty-one million, six hundred forty-four thousand, one hundred ninety-one".