21471022 has 8 divisors (see below), whose sum is σ = 32349096. Its totient is φ = 10687992.

The previous prime is 21471019. The next prime is 21471041. The reversal of 21471022 is 22017412.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21471022² = 922009571448968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23193 + ... + 24100.

It is an arithmetic number, because the mean of its divisors is an integer number (4043637).

Almost surely, 2^21471022 is an apocalyptic number.

21471022 is a deficient number, since it is larger than the sum of its proper divisors (10878074).

21471022 is a wasteful number, since it uses less digits than its factorization.

21471022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47522.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 21471022 is about 4633.6834160309. The cubic root of 21471022 is about 277.9399055792.

Adding to 21471022 its reverse (22017412), we get a palindrome (43488434).

The spelling of 21471022 in words is "twenty-one million, four hundred seventy-one thousand, twenty-two".