15242431 has 2 divisors, whose sum is σ = 15242432. Its totient is φ = 15242430.

The previous prime is 15242419. The next prime is 15242441. The reversal of 15242431 is 13424251.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15242431 - 2⁷ = 15242303 is a prime.

It is a super-2 number, since 2×15242431² = 464663405579522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15242401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7621215 + 7621216.

It is an arithmetic number, because the mean of its divisors is an integer number (7621216).

Almost surely, 2^15242431 is an apocalyptic number.

15242431 is a deficient number, since it is larger than the sum of its proper divisors (1).

15242431 is an equidigital number, since it uses as much as digits as its factorization.

15242431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 22.

The square root of 15242431 is about 3904.1556065300. The cubic root of 15242431 is about 247.9427493151.

Adding to 15242431 its reverse (13424251), we get a palindrome (28666682).

The spelling of 15242431 in words is "fifteen million, two hundred forty-two thousand, four hundred thirty-one".