15390281 has 2 divisors, whose sum is σ = 15390282. Its totient is φ = 15390280.

The previous prime is 15390269. The next prime is 15390283. The reversal of 15390281 is 18209351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15335056 + 55225 = 3916^2 + 235^2 .

It is a cyclic number.

It is not a de Polignac number, because 15390281 - 2¹⁸ = 15128137 is a prime.

It is a super-2 number, since 2×15390281² = 473721498517922, which contains 22 as substring.

Together with 15390283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15390283) 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 as a sum of consecutive naturals, namely, 7695140 + 7695141.

It is an arithmetic number, because the mean of its divisors is an integer number (7695141).

Almost surely, 2^15390281 is an apocalyptic number.

It is an amenable number.

15390281 is a deficient number, since it is larger than the sum of its proper divisors (1).

15390281 is an equidigital number, since it uses as much as digits as its factorization.

15390281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 15390281 is about 3923.0448633682. The cubic root of 15390281 is about 248.7418441305.

The spelling of 15390281 in words is "fifteen million, three hundred ninety thousand, two hundred eighty-one".