2161533 has 16 divisors (see below), whose sum is σ = 3329856. Its totient is φ = 1232640.

The previous prime is 2161513. The next prime is 2161553. The reversal of 2161533 is 3351612.

It is an interprime number because it is at equal distance from previous prime (2161513) and next prime (2161553).

It is not a de Polignac number, because 2161533 - 2⁶ = 2161469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1366 + ... + 2487.

It is an arithmetic number, because the mean of its divisors is an integer number (208116).

2^2161533 is an apocalyptic number.

It is an amenable number.

2161533 is a deficient number, since it is larger than the sum of its proper divisors (1168323).

2161533 is a wasteful number, since it uses less digits than its factorization.

2161533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3884.

The product of its digits is 540, while the sum is 21.

The square root of 2161533 is about 1470.2152903572. The cubic root of 2161533 is about 129.2966551736.

The spelling of 2161533 in words is "two million, one hundred sixty-one thousand, five hundred thirty-three".