1213430536 has 16 divisors (see below), whose sum is σ = 2275780140. Its totient is φ = 606555840.

The previous prime is 1213430531. The next prime is 1213430567. The reversal of 1213430536 is 6350343121.

It can be written as a sum of positive squares in 2 ways, for example, as 1206172900 + 7257636 = 34730^2 + 2694^2 .

It is not an unprimeable number, because it can be changed into a prime (1213430531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16290 + ... + 51886.

Almost surely, 2^1213430536 is an apocalyptic number.

It is an amenable number.

1213430536 is a deficient number, since it is larger than the sum of its proper divisors (1062349604).

1213430536 is a wasteful number, since it uses less digits than its factorization.

1213430536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39864 (or 39860 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 1213430536 is about 34834.3298485847. The cubic root of 1213430536 is about 1066.6083352650.

Adding to 1213430536 its reverse (6350343121), we get a palindrome (7563773657).

The spelling of 1213430536 in words is "one billion, two hundred thirteen million, four hundred thirty thousand, five hundred thirty-six".