151532281 has 2 divisors, whose sum is σ = 151532282. Its totient is φ = 151532280.

The previous prime is 151532243. The next prime is 151532287. The reversal of 151532281 is 182235151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82973881 + 68558400 = 9109^2 + 8280^2 .

It is a cyclic number.

It is not a de Polignac number, because 151532281 - 2¹⁹ = 151007993 is a prime.

It is a super-2 number, since 2×151532281² = 45924064370125922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (151532287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75766140 + 75766141.

It is an arithmetic number, because the mean of its divisors is an integer number (75766141).

Almost surely, 2^151532281 is an apocalyptic number.

It is an amenable number.

151532281 is a deficient number, since it is larger than the sum of its proper divisors (1).

151532281 is an equidigital number, since it uses as much as digits as its factorization.

151532281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 28.

The square root of 151532281 is about 12309.8448812323. The cubic root of 151532281 is about 533.1323716389.

The spelling of 151532281 in words is "one hundred fifty-one million, five hundred thirty-two thousand, two hundred eighty-one".