2521533 has 16 divisors (see below), whose sum is σ = 3870720. Its totient is φ = 1430256.

The previous prime is 2521517. The next prime is 2521537. The reversal of 2521533 is 3351252.

It is not a de Polignac number, because 2521533 - 2⁴ = 2521517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521537) 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, 3148 + ... + 3866.

It is an arithmetic number, because the mean of its divisors is an integer number (241920).

2^2521533 is an apocalyptic number.

It is an amenable number.

2521533 is a deficient number, since it is larger than the sum of its proper divisors (1349187).

2521533 is a wasteful number, since it uses less digits than its factorization.

2521533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896.

The product of its digits is 900, while the sum is 21.

The square root of 2521533 is about 1587.9335628420. The cubic root of 2521533 is about 136.1094310990.

Adding to 2521533 its reverse (3351252), we get a palindrome (5872785).

The spelling of 2521533 in words is "two million, five hundred twenty-one thousand, five hundred thirty-three".