11213858 has 4 divisors (see below), whose sum is σ = 16820790. Its totient is φ = 5606928.

The previous prime is 11213843. The next prime is 11213957. The reversal of 11213858 is 85831211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85831211 = 1601 ⋅53611.

It can be written as a sum of positive squares in only one way, i.e., 11202409 + 11449 = 3347^2 + 107^2 .

It is a super-2 number, since 2×11213858² = 251501222488328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11213858.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2803463 + ... + 2803466.

Almost surely, 2^11213858 is an apocalyptic number.

11213858 is a deficient number, since it is larger than the sum of its proper divisors (5606932).

11213858 is an equidigital number, since it uses as much as digits as its factorization.

11213858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606931.

The product of its digits is 1920, while the sum is 29.

The square root of 11213858 is about 3348.7099008424. The cubic root of 11213858 is about 223.8300289030.

The spelling of 11213858 in words is "eleven million, two hundred thirteen thousand, eight hundred fifty-eight".