1216332430 has 16 divisors (see below), whose sum is σ = 2260024704. Its totient is φ = 470838240.

The previous prime is 1216332419. The next prime is 1216332431. The reversal of 1216332430 is 342336121.

It is a junction number, because it is equal to n+sod(n) for n = 1216332395 and 1216332404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216332431) 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, 1961517 + ... + 1962136.

It is an arithmetic number, because the mean of its divisors is an integer number (141251544).

Almost surely, 2^1216332430 is an apocalyptic number.

1216332430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216332430 is a deficient number, since it is larger than the sum of its proper divisors (1043692274).

1216332430 is a wasteful number, since it uses less digits than its factorization.

1216332430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923691.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 1216332430 is about 34875.9577646263. The cubic root of 1216332430 is about 1067.4579156223.

Adding to 1216332430 its reverse (342336121), we get a palindrome (1558668551).

The spelling of 1216332430 in words is "one billion, two hundred sixteen million, three hundred thirty-two thousand, four hundred thirty".