15221007242 has 16 divisors (see below), whose sum is σ = 26351505792. Its totient is φ = 6458701200.

The previous prime is 15221007233. The next prime is 15221007247. The reversal of 15221007242 is 24270012251.

15221007242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15221007242² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15221007247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5380838 + ... + 5383665.

It is an arithmetic number, because the mean of its divisors is an integer number (1646969112).

Almost surely, 2^15221007242 is an apocalyptic number.

15221007242 is a deficient number, since it is larger than the sum of its proper divisors (11130498550).

15221007242 is a wasteful number, since it uses less digits than its factorization.

15221007242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10764613.

The product of its (nonzero) digits is 2240, while the sum is 26.

Adding to 15221007242 its reverse (24270012251), we get a palindrome (39491019493).

The spelling of 15221007242 in words is "fifteen billion, two hundred twenty-one million, seven thousand, two hundred forty-two".