2011572 has 36 divisors (see below), whose sum is σ = 5162976. Its totient is φ = 660240.

The previous prime is 2011561. The next prime is 2011573. The reversal of 2011572 is 2751102.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×2011572² = 8092843822368, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2163 + ... + 2949.

It is an arithmetic number, because the mean of its divisors is an integer number (143416).

2^2011572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2011572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2581488).

2011572 is an abundant number, since it is smaller than the sum of its proper divisors (3151404).

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

2011572 is a wasteful number, since it uses less digits than its factorization.

2011572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868 (or 863 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 2011572 is about 1418.2989811743. The cubic root of 2011572 is about 126.2346346036.

Adding to 2011572 its reverse (2751102), we get a palindrome (4762674).

The spelling of 2011572 in words is "two million, eleven thousand, five hundred seventy-two".