1215216402 has 16 divisors (see below), whose sum is σ = 2558350560. Its totient is φ = 383752512.

The previous prime is 1215216347. The next prime is 1215216403. The reversal of 1215216402 is 2046125121.

It is not an unprimeable number, because it can be changed into a prime (1215216403) 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, 5329783 + ... + 5330010.

It is an arithmetic number, because the mean of its divisors is an integer number (159896910).

Almost surely, 2^1215216402 is an apocalyptic number.

1215216402 is an abundant number, since it is smaller than the sum of its proper divisors (1343134158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1215216402 is a wasteful number, since it uses less digits than its factorization.

1215216402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10659817.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1215216402 is about 34859.9541307788. The cubic root of 1215216402 is about 1067.1313389299.

The spelling of 1215216402 in words is "one billion, two hundred fifteen million, two hundred sixteen thousand, four hundred two".