151801591 has 2 divisors, whose sum is σ = 151801592. Its totient is φ = 151801590.

The previous prime is 151801589. The next prime is 151801603. The reversal of 151801591 is 195108151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 151801591 - 2¹ = 151801589 is a prime.

Together with 151801589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151801561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75900795 + 75900796.

It is an arithmetic number, because the mean of its divisors is an integer number (75900796).

Almost surely, 2^151801591 is an apocalyptic number.

151801591 is a deficient number, since it is larger than the sum of its proper divisors (1).

151801591 is an equidigital number, since it uses as much as digits as its factorization.

151801591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 31.

The square root of 151801591 is about 12320.7788309019. The cubic root of 151801591 is about 533.4480203448.

The spelling of 151801591 in words is "one hundred fifty-one million, eight hundred one thousand, five hundred ninety-one".