1213451323 has 8 divisors (see below), whose sum is σ = 1387231200. Its totient is φ = 1039778880.

The previous prime is 1213451303. The next prime is 1213451339. The reversal of 1213451323 is 3231543121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1213451323 is a prime.

It is a super-2 number, since 2×1213451323² = 2944928226580900658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213451303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 988 + ... + 49273.

It is an arithmetic number, because the mean of its divisors is an integer number (173403900).

Almost surely, 2^1213451323 is an apocalyptic number.

1213451323 is a deficient number, since it is larger than the sum of its proper divisors (173779877).

1213451323 is an equidigital number, since it uses as much as digits as its factorization.

1213451323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53717.

The product of its digits is 2160, while the sum is 25.

The square root of 1213451323 is about 34834.6282167616. The cubic root of 1213451323 is about 1066.6144258378.

Adding to 1213451323 its reverse (3231543121), we get a palindrome (4444994444).

The spelling of 1213451323 in words is "one billion, two hundred thirteen million, four hundred fifty-one thousand, three hundred twenty-three".