2521822 has 4 divisors (see below), whose sum is σ = 3782736. Its totient is φ = 1260910.

The previous prime is 2521817. The next prime is 2521823. The reversal of 2521822 is 2281252.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 2521793 and 2521802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630454 + ... + 630457.

It is an arithmetic number, because the mean of its divisors is an integer number (945684).

2^2521822 is an apocalyptic number.

2521822 is a deficient number, since it is larger than the sum of its proper divisors (1260914).

2521822 is a wasteful number, since it uses less digits than its factorization.

2521822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260913.

The product of its digits is 640, while the sum is 22.

The square root of 2521822 is about 1588.0245590040. The cubic root of 2521822 is about 136.1146308621.

The spelling of 2521822 in words is "two million, five hundred twenty-one thousand, eight hundred twenty-two".