1215446223 has 4 divisors (see below), whose sum is σ = 1620594968. Its totient is φ = 810297480.

The previous prime is 1215446203. The next prime is 1215446311. The reversal of 1215446223 is 3226445121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3226445121 = 3 ⋅1075481707.

It is not a de Polignac number, because 1215446223 - 2⁹ = 1215445711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215446203) 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, 202574368 + ... + 202574373.

It is an arithmetic number, because the mean of its divisors is an integer number (405148742).

Almost surely, 2^1215446223 is an apocalyptic number.

1215446223 is a deficient number, since it is larger than the sum of its proper divisors (405148745).

1215446223 is an equidigital number, since it uses as much as digits as its factorization.

1215446223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405148744.

The product of its digits is 11520, while the sum is 30.

The square root of 1215446223 is about 34863.2503217930. The cubic root of 1215446223 is about 1067.1986064366.

The spelling of 1215446223 in words is "one billion, two hundred fifteen million, four hundred forty-six thousand, two hundred twenty-three".