1216332425 has 24 divisors (see below), whose sum is σ = 1880421312. Its totient is φ = 758232000.

The previous prime is 1216332419. The next prime is 1216332431. The reversal of 1216332425 is 5242336121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1216332419) and next prime (1216332431).

It is not a de Polignac number, because 1216332425 - 2⁴ = 1216332409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 314006 + ... + 317855.

It is an arithmetic number, because the mean of its divisors is an integer number (78350888).

Almost surely, 2^1216332425 is an apocalyptic number.

It is an amenable number.

1216332425 is a deficient number, since it is larger than the sum of its proper divisors (664088887).

1216332425 is a wasteful number, since it uses less digits than its factorization.

1216332425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631889 (or 631884 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 1216332425 is about 34875.9576929437. The cubic root of 1216332425 is about 1067.4579141596.

Adding to 1216332425 its reverse (5242336121), we get a palindrome (6458668546).

The spelling of 1216332425 in words is "one billion, two hundred sixteen million, three hundred thirty-two thousand, four hundred twenty-five".