1513225220 has 96 divisors (see below), whose sum is σ = 3578450400. Its totient is φ = 533643264.

The previous prime is 1513225159. The next prime is 1513225271. The reversal of 1513225220 is 225223151.

It can be written as a sum of positive squares in 16 ways, for example, as 871312324 + 641912896 = 29518^2 + 25336^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 730346 + ... + 732414.

It is an arithmetic number, because the mean of its divisors is an integer number (37275525).

Almost surely, 2^1513225220 is an apocalyptic number.

1513225220 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 1513225220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1789225200).

1513225220 is an abundant number, since it is smaller than the sum of its proper divisors (2065225180).

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

1513225220 is a wasteful number, since it uses less digits than its factorization.

1513225220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217 (or 2215 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1513225220 is about 38900.1956293281. The cubic root of 1513225220 is about 1148.0686473294.

Adding to 1513225220 its reverse (225223151), we get a palindrome (1738448371).

The spelling of 1513225220 in words is "one billion, five hundred thirteen million, two hundred twenty-five thousand, two hundred twenty".