15313221126 has 128 divisors (see below), whose sum is σ = 39250344960. Its totient is φ = 4334985216.

The previous prime is 15313221109. The next prime is 15313221127. The reversal of 15313221126 is 62112231351.

15313221126 is a `hidden beast` number, since 1 + 5 + 313 + 221 + 126 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 15313221126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15313221127) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27492040 + ... + 27492596.

It is an arithmetic number, because the mean of its divisors is an integer number (306643320).

Almost surely, 2^15313221126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15313221126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19625172480).

15313221126 is an abundant number, since it is smaller than the sum of its proper divisors (23937123834).

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

15313221126 is a wasteful number, since it uses less digits than its factorization.

15313221126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115 (or 1109 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

Adding to 15313221126 its reverse (62112231351), we get a palindrome (77425452477).

The spelling of 15313221126 in words is "fifteen billion, three hundred thirteen million, two hundred twenty-one thousand, one hundred twenty-six".