15424243442 has 8 divisors (see below), whose sum is σ = 23157459036. Its totient is φ = 7705090432.

The previous prime is 15424243423. The next prime is 15424243447. The reversal of 15424243442 is 24434242451.

It can be written as a sum of positive squares in 2 ways, for example, as 15072718441 + 351525001 = 122771^2 + 18749^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (15424243447) 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, 3512903 + ... + 3517290.

Almost surely, 2^15424243442 is an apocalyptic number.

15424243442 is a deficient number, since it is larger than the sum of its proper divisors (7733215594).

15424243442 is a wasteful number, since it uses less digits than its factorization.

15424243442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7031292.

The product of its digits is 122880, while the sum is 35.

Adding to 15424243442 its reverse (24434242451), we get a palindrome (39858485893).

Subtracting 15424243442 from its reverse (24434242451), we obtain a palindrome (9009999009).

The spelling of 15424243442 in words is "fifteen billion, four hundred twenty-four million, two hundred forty-three thousand, four hundred forty-two".