1217463213 has 4 divisors (see below), whose sum is σ = 1623284288. Its totient is φ = 811642140.

The previous prime is 1217463197. The next prime is 1217463253. The reversal of 1217463213 is 3123647121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1217463213 - 2⁴ = 1217463197 is a prime.

It is a super-4 number, since 4×1217463213⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217463253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202910533 + ... + 202910538.

It is an arithmetic number, because the mean of its divisors is an integer number (405821072).

Almost surely, 2^1217463213 is an apocalyptic number.

It is an amenable number.

1217463213 is a deficient number, since it is larger than the sum of its proper divisors (405821075).

1217463213 is an equidigital number, since it uses as much as digits as its factorization.

1217463213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405821074.

The product of its digits is 6048, while the sum is 30.

The square root of 1217463213 is about 34892.1654959964. The cubic root of 1217463213 is about 1067.7886063042.

It can be divided in two parts, 12174632 and 13, that added together give a triangular number (12174645 = T₄₉₃₄).

The spelling of 1217463213 in words is "one billion, two hundred seventeen million, four hundred sixty-three thousand, two hundred thirteen".