21475113 has 8 divisors (see below), whose sum is σ = 31236576. Its totient is φ = 13015200.

The previous prime is 21475079. The next prime is 21475127. The reversal of 21475113 is 31157412.

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

It is not a de Polignac number, because 21475113 - 2²⁴ = 4697897 is a prime.

It is a super-2 number, since 2×21475113² = 922360956725538, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21475183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325348 + ... + 325413.

It is an arithmetic number, because the mean of its divisors is an integer number (3904572).

Almost surely, 2^21475113 is an apocalyptic number.

It is an amenable number.

21475113 is a deficient number, since it is larger than the sum of its proper divisors (9761463).

21475113 is a wasteful number, since it uses less digits than its factorization.

21475113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650775.

The product of its digits is 840, while the sum is 24.

The square root of 21475113 is about 4634.1248364713. The cubic root of 21475113 is about 277.9575569661.

It can be divided in two parts, 2147 and 5113, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 21475113 in words is "twenty-one million, four hundred seventy-five thousand, one hundred thirteen".