1213032313 has 8 divisors (see below), whose sum is σ = 1230301800. Its totient is φ = 1195780608.

The previous prime is 1213032307. The next prime is 1213032341. The reversal of 1213032313 is 3132303121.

It can be written as a sum of positive squares in 4 ways, for example, as 362026729 + 851005584 = 19027^2 + 29172^2 .

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 1213032313 - 2¹³ = 1213024121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213039313) 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, 196173 + ... + 202261.

It is an arithmetic number, because the mean of its divisors is an integer number (153787725).

Almost surely, 2^1213032313 is an apocalyptic number.

It is an amenable number.

1213032313 is a deficient number, since it is larger than the sum of its proper divisors (17269487).

1213032313 is an equidigital number, since it uses as much as digits as its factorization.

1213032313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8891.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1213032313 is about 34828.6134234483. The cubic root of 1213032313 is about 1066.4916428431.

Adding to 1213032313 its reverse (3132303121), we get a palindrome (4345335434).

The spelling of 1213032313 in words is "one billion, two hundred thirteen million, thirty-two thousand, three hundred thirteen".