1213505319 has 64 divisors (see below), whose sum is σ = 1915200000. Its totient is φ = 676698624.

The previous prime is 1213505303. The next prime is 1213505327. The reversal of 1213505319 is 9135053121.

It is not a de Polignac number, because 1213505319 - 2⁴ = 1213505303 is a prime.

It is a super-2 number, since 2×1213505319² = 2945190318482583522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213505329) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3201672 + ... + 3202050.

It is an arithmetic number, because the mean of its divisors is an integer number (29925000).

Almost surely, 2^1213505319 is an apocalyptic number.

1213505319 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1213505319 is a deficient number, since it is larger than the sum of its proper divisors (701694681).

1213505319 is a wasteful number, since it uses less digits than its factorization.

1213505319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 1213505319 is about 34835.4032415300. The cubic root of 1213505319 is about 1066.6302462934.

The spelling of 1213505319 in words is "one billion, two hundred thirteen million, five hundred five thousand, three hundred nineteen".