15244121442 has 64 divisors (see below), whose sum is σ = 35240707584. Its totient is φ = 4344695040.

The previous prime is 15244121441. The next prime is 15244121483. The reversal of 15244121442 is 24412144251.

It is not an unprimeable number, because it can be changed into a prime (15244121441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2001213 + ... + 2008815.

It is an arithmetic number, because the mean of its divisors is an integer number (550636056).

Almost surely, 2^15244121442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15244121442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17620353792).

15244121442 is an abundant number, since it is smaller than the sum of its proper divisors (19996586142).

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

15244121442 is a wasteful number, since it uses less digits than its factorization.

15244121442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9423.

The product of its digits is 10240, while the sum is 30.

Adding to 15244121442 its reverse (24412144251), we get a palindrome (39656265693).

The spelling of 15244121442 in words is "fifteen billion, two hundred forty-four million, one hundred twenty-one thousand, four hundred forty-two".