1521312522 has 32 divisors (see below), whose sum is σ = 3112205760. Its totient is φ = 495607680.

The previous prime is 1521312509. The next prime is 1521312547. The reversal of 1521312522 is 2252131251.

It is a junction number, because it is equal to n+sod(n) for n = 1521312492 and 1521312501.

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, 48822 + ... + 73662.

It is an arithmetic number, because the mean of its divisors is an integer number (97256430).

Almost surely, 2^1521312522 is an apocalyptic number.

1521312522 is an abundant number, since it is smaller than the sum of its proper divisors (1590893238).

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

1521312522 is a wasteful number, since it uses less digits than its factorization.

1521312522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25078.

The product of its digits is 1200, while the sum is 24.

The square root of 1521312522 is about 39004.0064865137. The cubic root of 1521312522 is about 1150.1102659235.

Adding to 1521312522 its reverse (2252131251), we get a palindrome (3773443773).

The spelling of 1521312522 in words is "one billion, five hundred twenty-one million, three hundred twelve thousand, five hundred twenty-two".