1520312493 has 32 divisors (see below), whose sum is σ = 2441866240. Its totient is φ = 821923200.

The previous prime is 1520312491. The next prime is 1520312539. The reversal of 1520312493 is 3942130251.

It is not a de Polignac number, because 1520312493 - 2¹ = 1520312491 is a prime.

It is a super-2 number, since 2×1520312493² = 4622700152743750098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1520312493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1520312491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 359793 + ... + 363993.

It is an arithmetic number, because the mean of its divisors is an integer number (76308320).

Almost surely, 2^1520312493 is an apocalyptic number.

It is an amenable number.

1520312493 is a deficient number, since it is larger than the sum of its proper divisors (921553747).

1520312493 is a wasteful number, since it uses less digits than its factorization.

1520312493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5137.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1520312493 is about 38991.1848114417. The cubic root of 1520312493 is about 1149.8582038151.

The spelling of 1520312493 in words is "one billion, five hundred twenty million, three hundred twelve thousand, four hundred ninety-three".