15251234220 has 144 divisors (see below), whose sum is σ = 48717789120. Its totient is φ = 3854366208.

The previous prime is 15251234177. The next prime is 15251234237. The reversal of 15251234220 is 2243215251.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 434362 + ... + 468158.

It is an arithmetic number, because the mean of its divisors is an integer number (338317980).

Almost surely, 2^15251234220 is an apocalyptic number.

15251234220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15251234220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24358894560).

15251234220 is an abundant number, since it is smaller than the sum of its proper divisors (33466554900).

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

15251234220 is a wasteful number, since it uses less digits than its factorization.

15251234220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33944 (or 33939 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 15251234220 its reverse (2243215251), we get a palindrome (17494449471).

The spelling of 15251234220 in words is "fifteen billion, two hundred fifty-one million, two hundred thirty-four thousand, two hundred twenty".