1213344431 has 8 divisors (see below), whose sum is σ = 1306971120. Its totient is φ = 1119759552.

The previous prime is 1213344421. The next prime is 1213344439. The reversal of 1213344431 is 1344433121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213344431 - 2¹⁰ = 1213343407 is a prime.

It is a super-2 number, since 2×1213344431² = 2944409416477427522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1213344431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213344439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76940 + ... + 91358.

It is an arithmetic number, because the mean of its divisors is an integer number (163371390).

Almost surely, 2^1213344431 is an apocalyptic number.

1213344431 is a deficient number, since it is larger than the sum of its proper divisors (93626689).

1213344431 is a wasteful number, since it uses less digits than its factorization.

1213344431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20905.

The product of its digits is 3456, while the sum is 26.

The square root of 1213344431 is about 34833.0939050783. The cubic root of 1213344431 is about 1066.5831058348.

Adding to 1213344431 its reverse (1344433121), we get a palindrome (2557777552).

The spelling of 1213344431 in words is "one billion, two hundred thirteen million, three hundred forty-four thousand, four hundred thirty-one".