1521130220 has 24 divisors (see below), whose sum is σ = 3195285408. Its totient is φ = 608278400.

The previous prime is 1521130213. The next prime is 1521130229. The reversal of 1521130220 is 220311251.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1521130229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79160 + ... + 96480.

It is an arithmetic number, because the mean of its divisors is an integer number (133136892).

Almost surely, 2^1521130220 is an apocalyptic number.

1521130220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1521130220 is an abundant number, since it is smaller than the sum of its proper divisors (1674155188).

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

1521130220 is a wasteful number, since it uses less digits than its factorization.

1521130220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21721 (or 21719 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1521130220 is about 39001.6694514478. The cubic root of 1521130220 is about 1150.0643240643.

Adding to 1521130220 its reverse (220311251), we get a palindrome (1741441471).

The spelling of 1521130220 in words is "one billion, five hundred twenty-one million, one hundred thirty thousand, two hundred twenty".