2011356 has 18 divisors (see below), whose sum is σ = 5084352. Its totient is φ = 670440.

The previous prime is 2011333. The next prime is 2011363. The reversal of 2011356 is 6531102.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27900 + ... + 27971.

It is an arithmetic number, because the mean of its divisors is an integer number (282464).

2^2011356 is an apocalyptic number.

It is an amenable number.

2011356 is an abundant number, since it is smaller than the sum of its proper divisors (3072996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2011356 is a wasteful number, since it uses less digits than its factorization.

2011356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55881 (or 55876 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2011356 is about 1418.2228315748. Note that the first 3 decimals coincide. The cubic root of 2011356 is about 126.2301161379.

Adding to 2011356 its reverse (6531102), we get a palindrome (8542458).

The spelling of 2011356 in words is "two million, eleven thousand, three hundred fifty-six".