1216442031 has 32 divisors (see below), whose sum is σ = 1869385728. Its totient is φ = 689230080.

The previous prime is 1216442011. The next prime is 1216442041. The reversal of 1216442031 is 1302446121.

It is not a de Polignac number, because 1216442031 - 2⁷ = 1216441903 is a prime.

It is a super-2 number, since 2×1216442031² = 2959462429566809922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1216441992 and 1216442010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216442011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1971235 + ... + 1971851.

It is an arithmetic number, because the mean of its divisors is an integer number (58418304).

Almost surely, 2^1216442031 is an apocalyptic number.

1216442031 is a deficient number, since it is larger than the sum of its proper divisors (652943697).

1216442031 is a wasteful number, since it uses less digits than its factorization.

1216442031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1216442031 is about 34877.5290265810. The cubic root of 1216442031 is about 1067.4899767426.

Adding to 1216442031 its reverse (1302446121), we get a palindrome (2518888152).

The spelling of 1216442031 in words is "one billion, two hundred sixteen million, four hundred forty-two thousand, thirty-one".