21532822 has 4 divisors (see below), whose sum is σ = 32299236. Its totient is φ = 10766410.

The previous prime is 21532811. The next prime is 21532837. The reversal of 21532822 is 22823512.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5383204 + ... + 5383207.

It is an arithmetic number, because the mean of its divisors is an integer number (8074809).

Almost surely, 2^21532822 is an apocalyptic number.

21532822 is a deficient number, since it is larger than the sum of its proper divisors (10766414).

21532822 is a wasteful number, since it uses less digits than its factorization.

21532822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10766413.

The product of its digits is 1920, while the sum is 25.

The square root of 21532822 is about 4640.3471852869. The cubic root of 21532822 is about 278.2063147670.

The spelling of 21532822 in words is "twenty-one million, five hundred thirty-two thousand, eight hundred twenty-two".