1919313513 has 12 divisors (see below), whose sum is σ = 2985598980. Its totient is φ = 1181115936.

The previous prime is 1919313511. The next prime is 1919313523. The reversal of 1919313513 is 3153139191.

It can be written as a sum of positive squares in 2 ways, for example, as 217503504 + 1701810009 = 14748^2 + 41253^2 .

It is not a de Polignac number, because 1919313513 - 2¹ = 1919313511 is a prime.

It is a super-2 number, since 2×1919313513² = 7367528722368802338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1919313511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8202078 + ... + 8202311.

It is an arithmetic number, because the mean of its divisors is an integer number (248799915).

Almost surely, 2^1919313513 is an apocalyptic number.

1919313513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1919313513 is a deficient number, since it is larger than the sum of its proper divisors (1066285467).

1919313513 is a wasteful number, since it uses less digits than its factorization.

1919313513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16404408 (or 16404405 counting only the distinct ones).

The product of its digits is 10935, while the sum is 36.

The square root of 1919313513 is about 43809.9704747675. The cubic root of 1919313513 is about 1242.7448545346.

The spelling of 1919313513 in words is "one billion, nine hundred nineteen million, three hundred thirteen thousand, five hundred thirteen".