15314531 has 2 divisors, whose sum is σ = 15314532. Its totient is φ = 15314530.

The previous prime is 15314491. The next prime is 15314539. The reversal of 15314531 is 13541351.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15314531 is a prime.

It is a super-2 number, since 2×15314531² = 469069719499922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 15314497 and 15314506.

It is not a weakly prime, because it can be changed into another prime (15314539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7657265 + 7657266.

It is an arithmetic number, because the mean of its divisors is an integer number (7657266).

Almost surely, 2^15314531 is an apocalyptic number.

15314531 is a deficient number, since it is larger than the sum of its proper divisors (1).

15314531 is an equidigital number, since it uses as much as digits as its factorization.

15314531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 23.

The square root of 15314531 is about 3913.3784636807. The cubic root of 15314531 is about 248.3330754868. Note that the first 3 decimals are identical.

Adding to 15314531 its reverse (13541351), we get a palindrome (28855882).

The spelling of 15314531 in words is "fifteen million, three hundred fourteen thousand, five hundred thirty-one".