15606131 has 2 divisors, whose sum is σ = 15606132. Its totient is φ = 15606130.

The previous prime is 15606127. The next prime is 15606137. The reversal of 15606131 is 13160651.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15606131 - 2² = 15606127 is a prime.

It is a super-2 number, since 2×15606131² = 487102649578322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 15606097 and 15606106.

It is not a weakly prime, because it can be changed into another prime (15606137) 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, 7803065 + 7803066.

It is an arithmetic number, because the mean of its divisors is an integer number (7803066).

Almost surely, 2^15606131 is an apocalyptic number.

15606131 is a deficient number, since it is larger than the sum of its proper divisors (1).

15606131 is an equidigital number, since it uses as much as digits as its factorization.

15606131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 15606131 is about 3950.4595935157. The cubic root of 15606131 is about 249.8993247968.

Adding to 15606131 its reverse (13160651), we get a palindrome (28766782).

The spelling of 15606131 in words is "fifteen million, six hundred six thousand, one hundred thirty-one".