15380531 has 2 divisors, whose sum is σ = 15380532. Its totient is φ = 15380530.

The previous prime is 15380513. The next prime is 15380549. The reversal of 15380531 is 13508351.

15380531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (15380513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (15380513) and next prime (15380549).

It is a cyclic number.

It is not a de Polignac number, because 15380531 - 2¹⁴ = 15364147 is a prime.

It is a super-2 number, since 2×15380531² = 473121467683922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15380531.

It is not a weakly prime, because it can be changed into another prime (15380551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7690265 + 7690266.

It is an arithmetic number, because the mean of its divisors is an integer number (7690266).

Almost surely, 2^15380531 is an apocalyptic number.

15380531 is a deficient number, since it is larger than the sum of its proper divisors (1).

15380531 is an equidigital number, since it uses as much as digits as its factorization.

15380531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 15380531 is about 3921.8020092809. The cubic root of 15380531 is about 248.6893056637.

Adding to 15380531 its reverse (13508351), we get a palindrome (28888882).

The spelling of 15380531 in words is "fifteen million, three hundred eighty thousand, five hundred thirty-one".