151831989 has 24 divisors (see below), whose sum is σ = 231186592. Its totient is φ = 99552240.

The previous prime is 151831969. The next prime is 151831997. The reversal of 151831989 is 989138151.

It is not a de Polignac number, because 151831989 - 2⁷ = 151831861 is a prime.

It is a super-2 number, since 2×151831989² = 46105905767392242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151831919) 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 in 23 ways as a sum of consecutive naturals, for example, 9702 + ... + 19944.

Almost surely, 2^151831989 is an apocalyptic number.

It is an amenable number.

151831989 is a deficient number, since it is larger than the sum of its proper divisors (79354603).

151831989 is an equidigital number, since it uses as much as digits as its factorization.

151831989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10319 (or 10307 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The square root of 151831989 is about 12322.0123762314. The cubic root of 151831989 is about 533.4836253091.

The spelling of 151831989 in words is "one hundred fifty-one million, eight hundred thirty-one thousand, nine hundred eighty-nine".