152991281 has 2 divisors, whose sum is σ = 152991282. Its totient is φ = 152991280.

The previous prime is 152991271. The next prime is 152991353. The reversal of 152991281 is 182199251.

It is a happy number.

152991281 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., 152152225 + 839056 = 12335^2 + 916^2 .

It is a cyclic number.

It is not a de Polignac number, because 152991281 - 2²⁶ = 85882417 is a prime.

It is a super-2 number, since 2×152991281² = 46812664124041922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_8602958 and since 152991281 and 8602958 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (152991271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76495640 + 76495641.

It is an arithmetic number, because the mean of its divisors is an integer number (76495641).

Almost surely, 2^152991281 is an apocalyptic number.

It is an amenable number.

152991281 is a deficient number, since it is larger than the sum of its proper divisors (1).

152991281 is an equidigital number, since it uses as much as digits as its factorization.

152991281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 38.

The square root of 152991281 is about 12368.9644271459. The cubic root of 152991281 is about 534.8379641471.

The spelling of 152991281 in words is "one hundred fifty-two million, nine hundred ninety-one thousand, two hundred eighty-one".