1213214431 has 16 divisors (see below), whose sum is σ = 1455648768. Its totient is φ = 996415200.

The previous prime is 1213214413. The next prime is 1213214461. The reversal of 1213214431 is 1344123121.

It is not a de Polignac number, because 1213214431 - 2⁵ = 1213214399 is a prime.

It is a super-2 number, since 2×1213214431² = 2943778511173307522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213214411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83535 + ... + 96976.

It is an arithmetic number, because the mean of its divisors is an integer number (90978048).

Almost surely, 2^1213214431 is an apocalyptic number.

1213214431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213214431 is a deficient number, since it is larger than the sum of its proper divisors (242434337).

1213214431 is a wasteful number, since it uses less digits than its factorization.

1213214431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180582.

The product of its digits is 576, while the sum is 22.

The square root of 1213214431 is about 34831.2278135583. The cubic root of 1213214431 is about 1066.5450125689.

Adding to 1213214431 its reverse (1344123121), we get a palindrome (2557337552).

The spelling of 1213214431 in words is "one billion, two hundred thirteen million, two hundred fourteen thousand, four hundred thirty-one".