1213343451 has 6 divisors (see below), whose sum is σ = 1752607220. Its totient is φ = 808895628.

The previous prime is 1213343429. The next prime is 1213343459. The reversal of 1213343451 is 1543433121.

It is a happy number.

It is not a de Polignac number, because 1213343451 - 2¹⁴ = 1213327067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213343459) 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, 67407961 + ... + 67407978.

Almost surely, 2^1213343451 is an apocalyptic number.

1213343451 is a deficient number, since it is larger than the sum of its proper divisors (539263769).

1213343451 is a wasteful number, since it uses less digits than its factorization.

1213343451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134815945 (or 134815942 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 1213343451 is about 34833.0798379931. The cubic root of 1213343451 is about 1066.5828186804.

Adding to 1213343451 its reverse (1543433121), we get a palindrome (2756776572).

The spelling of 1213343451 in words is "one billion, two hundred thirteen million, three hundred forty-three thousand, four hundred fifty-one".