151968881 has 2 divisors, whose sum is σ = 151968882. Its totient is φ = 151968880.

The previous prime is 151968877. The next prime is 151968911. The reversal of 151968881 is 188869151.

151968881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139830625 + 12138256 = 11825^2 + 3484^2 .

It is a cyclic number.

It is not a de Polignac number, because 151968881 - 2² = 151968877 is a prime.

It is a super-2 number, since 2×151968881² = 46189081584784322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (151968871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75984440 + 75984441.

It is an arithmetic number, because the mean of its divisors is an integer number (75984441).

Almost surely, 2^151968881 is an apocalyptic number.

It is an amenable number.

151968881 is a deficient number, since it is larger than the sum of its proper divisors (1).

151968881 is an equidigital number, since it uses as much as digits as its factorization.

151968881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 47.

The square root of 151968881 is about 12327.5658992357. The cubic root of 151968881 is about 533.6439070872.

The spelling of 151968881 in words is "one hundred fifty-one million, nine hundred sixty-eight thousand, eight hundred eighty-one".