2145533 has 4 divisors (see below), whose sum is σ = 2310588. Its totient is φ = 1980480.

The previous prime is 2145529. The next prime is 2145547. The reversal of 2145533 is 3355412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1119364 + 1026169 = 1058^2 + 1013^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145533 - 2² = 2145529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2145499 and 2145508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82508 + ... + 82533.

It is an arithmetic number, because the mean of its divisors is an integer number (577647).

2^2145533 is an apocalyptic number.

It is an amenable number.

2145533 is a deficient number, since it is larger than the sum of its proper divisors (165055).

2145533 is a wasteful number, since it uses less digits than its factorization.

2145533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165054.

The product of its digits is 1800, while the sum is 23.

The square root of 2145533 is about 1464.7638034851. The cubic root of 2145533 is about 128.9768401826.

Adding to 2145533 its sum of digits (23), we get a triangular number (2145556 = T₂₀₇₁).

It can be divided in two parts, 21 and 45533, that added together give a palindrome (45554).

The spelling of 2145533 in words is "two million, one hundred forty-five thousand, five hundred thirty-three".