1213232431 has 2 divisors, whose sum is σ = 1213232432. Its totient is φ = 1213232430.

The previous prime is 1213232369. The next prime is 1213232437. The reversal of 1213232431 is 1342323121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213232431 - 2¹³ = 1213224239 is a prime.

It is a super-2 number, since 2×1213232431² = 2943865863260339522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213232437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606616215 + 606616216.

It is an arithmetic number, because the mean of its divisors is an integer number (606616216).

Almost surely, 2^1213232431 is an apocalyptic number.

1213232431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213232431 is an equidigital number, since it uses as much as digits as its factorization.

1213232431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 1213232431 is about 34831.4862014241. The cubic root of 1213232431 is about 1066.5502871834.

Adding to 1213232431 its reverse (1342323121), we get a palindrome (2555555552).

The spelling of 1213232431 in words is "one billion, two hundred thirteen million, two hundred thirty-two thousand, four hundred thirty-one".