151820281 has 2 divisors, whose sum is σ = 151820282. Its totient is φ = 151820280.

The previous prime is 151820257. The next prime is 151820311. The reversal of 151820281 is 182028151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119159056 + 32661225 = 10916^2 + 5715^2 .

It is a cyclic number.

It is not a de Polignac number, because 151820281 - 2⁷ = 151820153 is a prime.

It is a super-2 number, since 2×151820281² = 46098795445837922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (151820231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75910140 + 75910141.

It is an arithmetic number, because the mean of its divisors is an integer number (75910141).

Almost surely, 2^151820281 is an apocalyptic number.

It is an amenable number.

151820281 is a deficient number, since it is larger than the sum of its proper divisors (1).

151820281 is an equidigital number, since it uses as much as digits as its factorization.

151820281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 151820281 is about 12321.5372823362. The cubic root of 151820281 is about 533.4699123735.

The spelling of 151820281 in words is "one hundred fifty-one million, eight hundred twenty thousand, two hundred eighty-one".