1215412213 has 8 divisors (see below), whose sum is σ = 1249905600. Its totient is φ = 1181382048.

The previous prime is 1215412193. The next prime is 1215412249. The reversal of 1215412213 is 3122145121.

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

It is a cyclic number.

It is not a de Polignac number, because 1215412213 - 2⁵ = 1215412181 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 (1215412313) 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, 110481 + ... + 120982.

It is an arithmetic number, because the mean of its divisors is an integer number (156238200).

Almost surely, 2^1215412213 is an apocalyptic number.

It is an amenable number.

1215412213 is a deficient number, since it is larger than the sum of its proper divisors (34493387).

1215412213 is an equidigital number, since it uses as much as digits as its factorization.

1215412213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231611.

The product of its digits is 480, while the sum is 22.

The square root of 1215412213 is about 34862.7625554832. The cubic root of 1215412213 is about 1067.1886524070.

Adding to 1215412213 its reverse (3122145121), we get a palindrome (4337557334).

The spelling of 1215412213 in words is "one billion, two hundred fifteen million, four hundred twelve thousand, two hundred thirteen".