1219256323 has 4 divisors (see below), whose sum is σ = 1219500448. Its totient is φ = 1219012200.

The previous prime is 1219256317. The next prime is 1219256369. The reversal of 1219256323 is 3236529121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3236529121 = 7 ⋅462361303.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1219256323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1219256383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114411 + ... + 124612.

It is an arithmetic number, because the mean of its divisors is an integer number (304875112).

Almost surely, 2^1219256323 is an apocalyptic number.

1219256323 is a deficient number, since it is larger than the sum of its proper divisors (244125).

1219256323 is an equidigital number, since it uses as much as digits as its factorization.

1219256323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244124.

The product of its digits is 19440, while the sum is 34.

The square root of 1219256323 is about 34917.8510650355. The cubic root of 1219256323 is about 1068.3125709952.

The spelling of 1219256323 in words is "one billion, two hundred nineteen million, two hundred fifty-six thousand, three hundred twenty-three".