151859891 has 2 divisors, whose sum is σ = 151859892. Its totient is φ = 151859890.

The previous prime is 151859887. The next prime is 151859933. The reversal of 151859891 is 198958151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 151859891 - 2² = 151859887 is a prime.

It is a super-2 number, since 2×151859891² = 46122852989063762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (151859831) 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, 75929945 + 75929946.

It is an arithmetic number, because the mean of its divisors is an integer number (75929946).

Almost surely, 2^151859891 is an apocalyptic number.

151859891 is a deficient number, since it is larger than the sum of its proper divisors (1).

151859891 is an equidigital number, since it uses as much as digits as its factorization.

151859891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 47.

The square root of 151859891 is about 12323.1445256477. The cubic root of 151859891 is about 533.5163025433.

The spelling of 151859891 in words is "one hundred fifty-one million, eight hundred fifty-nine thousand, eight hundred ninety-one".