15243131 has 2 divisors, whose sum is σ = 15243132. Its totient is φ = 15243130.

The previous prime is 15243127. The next prime is 15243139. The reversal of 15243131 is 13134251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15243131 - 2² = 15243127 is a prime.

It is a super-2 number, since 2×15243131² = 464706085366322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15243139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7621565 + 7621566.

It is an arithmetic number, because the mean of its divisors is an integer number (7621566).

Almost surely, 2^15243131 is an apocalyptic number.

15243131 is a deficient number, since it is larger than the sum of its proper divisors (1).

15243131 is an equidigital number, since it uses as much as digits as its factorization.

15243131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 20.

The square root of 15243131 is about 3904.2452535669. The cubic root of 15243131 is about 247.9465448004.

Adding to 15243131 its reverse (13134251), we get a palindrome (28377382).

The spelling of 15243131 in words is "fifteen million, two hundred forty-three thousand, one hundred thirty-one".