11228013 has 6 divisors (see below), whose sum is σ = 16218254. Its totient is φ = 7485336.

The previous prime is 11227987. The next prime is 11228023. The reversal of 11228013 is 31082211.

It can be written as a sum of positive squares in only one way, i.e., 11168964 + 59049 = 3342^2 + 243^2 .

It is not a de Polignac number, because 11228013 - 2¹³ = 11219821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11228023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 623770 + ... + 623787.

Almost surely, 2^11228013 is an apocalyptic number.

It is an amenable number.

11228013 is a deficient number, since it is larger than the sum of its proper divisors (4990241).

11228013 is a wasteful number, since it uses less digits than its factorization.

11228013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247563 (or 1247560 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 11228013 is about 3350.8227347922. The cubic root of 11228013 is about 223.9241678365.

The spelling of 11228013 in words is "eleven million, two hundred twenty-eight thousand, thirteen".