15242242331 has 4 divisors (see below), whose sum is σ = 15330347952. Its totient is φ = 15154136712.

The previous prime is 15242242321. The next prime is 15242242333. The reversal of 15242242331 is 13324224251.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15242242331 is a prime.

It is a super-2 number, since 2×15242242331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15242242294 and 15242242303.

It is not an unprimeable number, because it can be changed into a prime (15242242333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44052551 + ... + 44052896.

It is an arithmetic number, because the mean of its divisors is an integer number (3832586988).

Almost surely, 2^15242242331 is an apocalyptic number.

15242242331 is a deficient number, since it is larger than the sum of its proper divisors (88105621).

15242242331 is an equidigital number, since it uses as much as digits as its factorization.

15242242331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88105620.

The product of its digits is 11520, while the sum is 29.

Adding to 15242242331 its reverse (13324224251), we get a palindrome (28566466582).

The spelling of 15242242331 in words is "fifteen billion, two hundred forty-two million, two hundred forty-two thousand, three hundred thirty-one".