22471749 has 10 divisors (see below), whose sum is σ = 33569030. Its totient is φ = 14981112.

The previous prime is 22471727. The next prime is 22471751. The reversal of 22471749 is 94717422.

It can be written as a sum of positive squares in only one way, i.e., 12830724 + 9641025 = 3582^2 + 3105^2 .

It is not a de Polignac number, because 22471749 - 2⁹ = 22471237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22471769) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 138634 + ... + 138795.

It is an arithmetic number, because the mean of its divisors is an integer number (3356903).

Almost surely, 2^22471749 is an apocalyptic number.

It is an amenable number.

22471749 is a deficient number, since it is larger than the sum of its proper divisors (11097281).

22471749 is an equidigital number, since it uses as much as digits as its factorization.

22471749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277441 (or 277432 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 22471749 is about 4740.4376380246. The cubic root of 22471749 is about 282.1926026936.

It can be divided in two parts, 22471 and 749, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 22471749 in words is "twenty-two million, four hundred seventy-one thousand, seven hundred forty-nine".