2156011 has 8 divisors (see below), whose sum is σ = 2533104. Its totient is φ = 1809120.

The previous prime is 2156009. The next prime is 2156017. The reversal of 2156011 is 1106512.

It is a happy number.

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 2156011 - 2¹ = 2156009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7396 + ... + 7681.

It is an arithmetic number, because the mean of its divisors is an integer number (316638).

2^2156011 is an apocalyptic number.

2156011 is a deficient number, since it is larger than the sum of its proper divisors (377093).

2156011 is a wasteful number, since it uses less digits than its factorization.

2156011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15101.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 2156011 is about 1468.3361331793. The cubic root of 2156011 is about 129.1864579224.

It can be divided in two parts, 215 and 6011, that added together give a palindrome (6226).

The spelling of 2156011 in words is "two million, one hundred fifty-six thousand, eleven".