1213430553 has 6 divisors (see below), whose sum is σ = 1752733034. Its totient is φ = 808953696.

The previous prime is 1213430531. The next prime is 1213430567. The reversal of 1213430553 is 3550343121.

It can be written as a sum of positive squares in only one way, i.e., 1113690384 + 99740169 = 33372^2 + 9987^2 .

It is not a de Polignac number, because 1213430553 - 2¹³ = 1213422361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213430593) 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, 67412800 + ... + 67412817.

Almost surely, 2^1213430553 is an apocalyptic number.

It is an amenable number.

1213430553 is a deficient number, since it is larger than the sum of its proper divisors (539302481).

1213430553 is a wasteful number, since it uses less digits than its factorization.

1213430553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134825623 (or 134825620 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 1213430553 is about 34834.3300925969. The cubic root of 1213430553 is about 1066.6083402460.

Adding to 1213430553 its reverse (3550343121), we get a palindrome (4763773674).

The spelling of 1213430553 in words is "one billion, two hundred thirteen million, four hundred thirty thousand, five hundred fifty-three".