15213221142 has 32 divisors (see below), whose sum is σ = 34788118272. Its totient is φ = 4344754464.

The previous prime is 15213221123. The next prime is 15213221167. The reversal of 15213221142 is 24112231251.

It is a happy number.

15213221142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 21408 + ... + 175740.

It is an arithmetic number, because the mean of its divisors is an integer number (1087128696).

Almost surely, 2^15213221142 is an apocalyptic number.

15213221142 is an abundant number, since it is smaller than the sum of its proper divisors (19574897130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15213221142 is a wasteful number, since it uses less digits than its factorization.

15213221142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156692.

The product of its digits is 960, while the sum is 24.

Adding to 15213221142 its reverse (24112231251), we get a palindrome (39325452393).

The spelling of 15213221142 in words is "fifteen billion, two hundred thirteen million, two hundred twenty-one thousand, one hundred forty-two".