151511989 has 2 divisors, whose sum is σ = 151511990. Its totient is φ = 151511988.

The previous prime is 151511981. The next prime is 151511993. The reversal of 151511989 is 989115151.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140019889 + 11492100 = 11833^2 + 3390^2 .

It is a cyclic number.

It is not a de Polignac number, because 151511989 - 2³ = 151511981 is a prime.

It is a super-2 number, since 2×151511989² = 45911765621472242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151511981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75755994 + 75755995.

It is an arithmetic number, because the mean of its divisors is an integer number (75755995).

Almost surely, 2^151511989 is an apocalyptic number.

It is an amenable number.

151511989 is a deficient number, since it is larger than the sum of its proper divisors (1).

151511989 is an equidigital number, since it uses as much as digits as its factorization.

151511989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 40.

The square root of 151511989 is about 12309.0206352902. The cubic root of 151511989 is about 533.1085729584.

The spelling of 151511989 in words is "one hundred fifty-one million, five hundred eleven thousand, nine hundred eighty-nine".