1520313999 has 8 divisors (see below), whose sum is σ = 2052744960. Its totient is φ = 1000712856.

The previous prime is 1520313973. The next prime is 1520314001. The reversal of 1520313999 is 9993130251.

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

It is not a de Polignac number, because 1520313999 - 2¹⁷ = 1520182927 is a prime.

It is a super-2 number, since 2×1520313999² = 4622709311110744002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1520313999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520313959) 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, 3207177 + ... + 3207650.

It is an arithmetic number, because the mean of its divisors is an integer number (256593120).

Almost surely, 2^1520313999 is an apocalyptic number.

1520313999 is a deficient number, since it is larger than the sum of its proper divisors (532430961).

1520313999 is an equidigital number, since it uses as much as digits as its factorization.

1520313999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6414909.

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 1520313999 is about 38991.2041234943. The cubic root of 1520313999 is about 1149.8585834928.

The spelling of 1520313999 in words is "one billion, five hundred twenty million, three hundred thirteen thousand, nine hundred ninety-nine".