152397281 has 4 divisors (see below), whose sum is σ = 154109700. Its totient is φ = 150684864.

The previous prime is 152397277. The next prime is 152397283. The reversal of 152397281 is 182793251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 182793251 = 6029 ⋅30319.

It can be written as a sum of positive squares in 2 ways, for example, as 42042256 + 110355025 = 6484^2 + 10505^2 .

It is a cyclic number.

It is not a de Polignac number, because 152397281 - 2² = 152397277 is a prime.

It is a super-2 number, since 2×152397281² = 46449862512385922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152397283) 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 3 ways as a sum of consecutive naturals, for example, 856076 + ... + 856253.

It is an arithmetic number, because the mean of its divisors is an integer number (38527425).

Almost surely, 2^152397281 is an apocalyptic number.

It is an amenable number.

152397281 is a deficient number, since it is larger than the sum of its proper divisors (1712419).

152397281 is an equidigital number, since it uses as much as digits as its factorization.

152397281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1712418.

The product of its digits is 30240, while the sum is 38.

The square root of 152397281 is about 12344.9293639129. The cubic root of 152397281 is about 534.1448836998.

The spelling of 152397281 in words is "one hundred fifty-two million, three hundred ninety-seven thousand, two hundred eighty-one".