22028471 has 4 divisors (see below), whose sum is σ = 22074192. Its totient is φ = 21982752.

The previous prime is 22028459. The next prime is 22028473. The reversal of 22028471 is 17482022.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22028471 is a prime.

It is a super-3 number, since 3×22028471³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22028471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22028473) 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, 22130 + ... + 23103.

It is an arithmetic number, because the mean of its divisors is an integer number (5518548).

Almost surely, 2^22028471 is an apocalyptic number.

22028471 is a deficient number, since it is larger than the sum of its proper divisors (45721).

22028471 is an equidigital number, since it uses as much as digits as its factorization.

22028471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45720.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 22028471 is about 4693.4497973239. The cubic root of 22028471 is about 280.3247549935.

The spelling of 22028471 in words is "twenty-two million, twenty-eight thousand, four hundred seventy-one".