1213210431 has 6 divisors (see below), whose sum is σ = 1752415080. Its totient is φ = 808806948.

The previous prime is 1213210429. The next prime is 1213210489. The reversal of 1213210431 is 1340123121.

1213210431 is a `hidden beast` number, since 1 + 21 + 3 + 210 + 431 = 666.

It is not a de Polignac number, because 1213210431 - 2¹ = 1213210429 is a prime.

It is a super-2 number, since 2×1213210431² = 2943759099774411522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213218431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67400571 + ... + 67400588.

It is an arithmetic number, because the mean of its divisors is an integer number (292069180).

Almost surely, 2^1213210431 is an apocalyptic number.

1213210431 is a deficient number, since it is larger than the sum of its proper divisors (539204649).

1213210431 is a wasteful number, since it uses less digits than its factorization.

1213210431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134801165 (or 134801162 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1213210431 is about 34831.1703937723. The cubic root of 1213210431 is about 1066.5438404253.

Adding to 1213210431 its reverse (1340123121), we get a palindrome (2553333552).

The spelling of 1213210431 in words is "one billion, two hundred thirteen million, two hundred ten thousand, four hundred thirty-one".