1215883373 has 4 divisors (see below), whose sum is σ = 1241753280. Its totient is φ = 1190013468.

The previous prime is 1215883369. The next prime is 1215883399. The reversal of 1215883373 is 3733885121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3733885121 = 1229 ⋅3038149.

It is a cyclic number.

It is not a de Polignac number, because 1215883373 - 2² = 1215883369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1215883373.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215883303) 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, 12934883 + ... + 12934976.

It is an arithmetic number, because the mean of its divisors is an integer number (310438320).

Almost surely, 2^1215883373 is an apocalyptic number.

It is an amenable number.

1215883373 is a deficient number, since it is larger than the sum of its proper divisors (25869907).

1215883373 is an equidigital number, since it uses as much as digits as its factorization.

1215883373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25869906.

The product of its digits is 120960, while the sum is 41.

The square root of 1215883373 is about 34869.5192539272. The cubic root of 1215883373 is about 1067.3265347488.

The spelling of 1215883373 in words is "one billion, two hundred fifteen million, eight hundred eighty-three thousand, three hundred seventy-three".