1216332402 has 8 divisors (see below), whose sum is σ = 2432664816. Its totient is φ = 405444132.

The previous prime is 1216332401. The next prime is 1216332409. The reversal of 1216332402 is 2042336121.

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

1216332402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1216332401) 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, 101361028 + ... + 101361039.

It is an arithmetic number, because the mean of its divisors is an integer number (304083102).

Almost surely, 2^1216332402 is an apocalyptic number.

1216332402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1216332402 is a wasteful number, since it uses less digits than its factorization.

1216332402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202722072.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1216332402 is about 34875.9573632037. The cubic root of 1216332402 is about 1067.4579074313.

Adding to 1216332402 its reverse (2042336121), we get a palindrome (3258668523).

The spelling of 1216332402 in words is "one billion, two hundred sixteen million, three hundred thirty-two thousand, four hundred two".