1312223019 has 16 divisors (see below), whose sum is σ = 1806257952. Its totient is φ = 846747648.

The previous prime is 1312222991. The next prime is 1312223021. The reversal of 1312223019 is 9103222131.

It is not a de Polignac number, because 1312223019 - 2¹⁷ = 1312091947 is a prime.

It is a super-2 number, since 2×1312223019² = 3443858503186948722, 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 1312223019.

It is not an unprimeable number, because it can be changed into a prime (1312223089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9204 + ... + 52049.

It is an arithmetic number, because the mean of its divisors is an integer number (112891122).

Almost surely, 2^1312223019 is an apocalyptic number.

1312223019 is a deficient number, since it is larger than the sum of its proper divisors (494034933).

1312223019 is a wasteful number, since it uses less digits than its factorization.

1312223019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61486.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1312223019 is about 36224.6189627993. The cubic root of 1312223019 is about 1094.8027609128.

The spelling of 1312223019 in words is "one billion, three hundred twelve million, two hundred twenty-three thousand, nineteen".