1520445313 has 8 divisors (see below), whose sum is σ = 1595223296. Its totient is φ = 1447275600.

The previous prime is 1520445307. The next prime is 1520445359. The reversal of 1520445313 is 3135440251.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1520445313 - 2⁹ = 1520444801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1520445013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400131 + ... + 403912.

It is an arithmetic number, because the mean of its divisors is an integer number (199402912).

Almost surely, 2^1520445313 is an apocalyptic number.

It is an amenable number.

1520445313 is a deficient number, since it is larger than the sum of its proper divisors (74777983).

1520445313 is an equidigital number, since it uses as much as digits as its factorization.

1520445313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804135.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 1520445313 is about 38992.8879797329. The cubic root of 1520445313 is about 1149.8916880977.

Adding to 1520445313 its reverse (3135440251), we get a palindrome (4655885564).

The spelling of 1520445313 in words is "one billion, five hundred twenty million, four hundred forty-five thousand, three hundred thirteen".