15120220344 has 64 divisors (see below), whose sum is σ = 38150624640. Its totient is φ = 4993591680.

The previous prime is 15120220337. The next prime is 15120220373. The reversal of 15120220344 is 44302202151.

It is a super-2 number, since 2×15120220344² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1289034 + ... + 1300710.

It is an arithmetic number, because the mean of its divisors is an integer number (596103510).

Almost surely, 2^15120220344 is an apocalyptic number.

It is an amenable number.

15120220344 is an abundant number, since it is smaller than the sum of its proper divisors (23030404296).

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

15120220344 is a wasteful number, since it uses less digits than its factorization.

15120220344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12180 (or 12176 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 15120220344 its reverse (44302202151), we get a palindrome (59422422495).

The spelling of 15120220344 in words is "fifteen billion, one hundred twenty million, two hundred twenty thousand, three hundred forty-four".