151323281 has 2 divisors, whose sum is σ = 151323282. Its totient is φ = 151323280.

The previous prime is 151323269. The next prime is 151323287. The reversal of 151323281 is 182323151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131217025 + 20106256 = 11455^2 + 4484^2 .

It is an emirp because it is prime and its reverse (182323151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 151323281 - 2⁶ = 151323217 is a prime.

It is a super-2 number, since 2×151323281² = 45797470745209922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 151323281.

It is not a weakly prime, because it can be changed into another prime (151323287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75661640 + 75661641.

It is an arithmetic number, because the mean of its divisors is an integer number (75661641).

Almost surely, 2^151323281 is an apocalyptic number.

It is an amenable number.

151323281 is a deficient number, since it is larger than the sum of its proper divisors (1).

151323281 is an equidigital number, since it uses as much as digits as its factorization.

151323281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

The square root of 151323281 is about 12301.3528117846. The cubic root of 151323281 is about 532.8871523112.

The spelling of 151323281 in words is "one hundred fifty-one million, three hundred twenty-three thousand, two hundred eighty-one".