1215216506 has 8 divisors (see below), whose sum is σ = 2083228320. Its totient is φ = 520807068.

The previous prime is 1215216503. The next prime is 1215216521. The reversal of 1215216506 is 6056125121.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1215216503) 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, 43400576 + ... + 43400603.

It is an arithmetic number, because the mean of its divisors is an integer number (260403540).

Almost surely, 2^1215216506 is an apocalyptic number.

1215216506 is a deficient number, since it is larger than the sum of its proper divisors (868011814).

1215216506 is an equidigital number, since it uses as much as digits as its factorization.

1215216506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86801188.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 1215216506 is about 34859.9556224617. The cubic root of 1215216506 is about 1067.1313693721.

The spelling of 1215216506 in words is "one billion, two hundred fifteen million, two hundred sixteen thousand, five hundred six".