21471083 has 4 divisors (see below), whose sum is σ = 22601160. Its totient is φ = 20341008.

The previous prime is 21471077. The next prime is 21471089. The reversal of 21471083 is 38017412.

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

It is an interprime number because it is at equal distance from previous prime (21471077) and next prime (21471089).

It is a cyclic number.

It is not a de Polignac number, because 21471083 - 2⁴ = 21471067 is a prime.

It is a super-2 number, since 2×21471083² = 922014810385778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21471089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565010 + ... + 565047.

It is an arithmetic number, because the mean of its divisors is an integer number (5650290).

Almost surely, 2^21471083 is an apocalyptic number.

21471083 is a deficient number, since it is larger than the sum of its proper divisors (1130077).

21471083 is a wasteful number, since it uses less digits than its factorization.

21471083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130076.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 21471083 is about 4633.6899982627. The cubic root of 21471083 is about 277.9401687917.

Adding to 21471083 its reverse (38017412), we get a palindrome (59488495).

The spelling of 21471083 in words is "twenty-one million, four hundred seventy-one thousand, eighty-three".