11291213 has 8 divisors (see below), whose sum is σ = 11984760. Its totient is φ = 10600960.

The previous prime is 11291209. The next prime is 11291219. The reversal of 11291213 is 31219211.

It can be written as a sum of positive squares in 4 ways, for example, as 4012009 + 7279204 = 2003^2 + 2698^2 .

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 11291213 - 2² = 11291209 is a prime.

It is a super-2 number, since 2×11291213² = 254982982022738, 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 (11291219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13343 + ... + 14163.

It is an arithmetic number, because the mean of its divisors is an integer number (1498095).

Almost surely, 2^11291213 is an apocalyptic number.

It is an amenable number.

11291213 is a deficient number, since it is larger than the sum of its proper divisors (693547).

11291213 is an equidigital number, since it uses as much as digits as its factorization.

11291213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647.

The product of its digits is 108, while the sum is 20.

The square root of 11291213 is about 3360.2400211890. The cubic root of 11291213 is about 224.3435218602.

The spelling of 11291213 in words is "eleven million, two hundred ninety-one thousand, two hundred thirteen".