15315389 has 2 divisors, whose sum is σ = 15315390. Its totient is φ = 15315388.

The previous prime is 15315383. The next prime is 15315431. The reversal of 15315389 is 98351351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10176100 + 5139289 = 3190^2 + 2267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15315389 is a prime.

It is a super-2 number, since 2×15315389² = 469122280442642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15315383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7657694 + 7657695.

It is an arithmetic number, because the mean of its divisors is an integer number (7657695).

Almost surely, 2^15315389 is an apocalyptic number.

It is an amenable number.

15315389 is a deficient number, since it is larger than the sum of its proper divisors (1).

15315389 is an equidigital number, since it uses as much as digits as its factorization.

15315389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 35.

The square root of 15315389 is about 3913.4880860940. The cubic root of 15315389 is about 248.3377130388.

The spelling of 15315389 in words is "fifteen million, three hundred fifteen thousand, three hundred eighty-nine".