7521822 has 112 divisors (see below), whose sum is σ = 21405312. Its totient is φ = 1924560.

The previous prime is 7521821. The next prime is 7521823. The reversal of 7521822 is 2281257.

7521822 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7521821) and next prime (7521823).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7521821) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 112233 + ... + 112299.

Almost surely, 2^7521822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7521822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10702656).

7521822 is an abundant number, since it is smaller than the sum of its proper divisors (13883490).

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

7521822 is a wasteful number, since it uses less digits than its factorization.

7521822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 90 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 7521822 is about 2742.5940275586. The cubic root of 7521822 is about 195.9330432127.

The spelling of 7521822 in words is "seven million, five hundred twenty-one thousand, eight hundred twenty-two".