11451213 has 20 divisors (see below), whose sum is σ = 17276380. Its totient is φ = 7558272.

The previous prime is 11451211. The next prime is 11451227. The reversal of 11451213 is 31215411.

11451213 is a `hidden beast` number, since 1 + 1 + 451 + 213 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10323369 + 1127844 = 3213^2 + 1062^2 .

It is not a de Polignac number, because 11451213 - 2¹ = 11451211 is a prime.

It is a super-2 number, since 2×11451213² = 262260558342738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11451211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8181 + ... + 9477.

It is an arithmetic number, because the mean of its divisors is an integer number (863819).

Almost surely, 2^11451213 is an apocalyptic number.

It is an amenable number.

11451213 is a deficient number, since it is larger than the sum of its proper divisors (5825167).

11451213 is a wasteful number, since it uses less digits than its factorization.

11451213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418 (or 1409 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 11451213 is about 3383.9640955542. The cubic root of 11451213 is about 225.3982280926.

Adding to 11451213 its reverse (31215411), we get a palindrome (42666624).

It can be divided in two parts, 11451 and 213, that added together give a square (11664 = 108²).

The spelling of 11451213 in words is "eleven million, four hundred fifty-one thousand, two hundred thirteen".