22161730 has 32 divisors (see below), whose sum is σ = 41223168. Its totient is φ = 8572800.

The previous prime is 22161721. The next prime is 22161751. The reversal of 22161730 is 3716122.

It is a super-2 number, since 2×22161730² = 982284553185800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78169 + ... + 78451.

It is an arithmetic number, because the mean of its divisors is an integer number (1288224).

Almost surely, 2^22161730 is an apocalyptic number.

22161730 is a deficient number, since it is larger than the sum of its proper divisors (19061438).

22161730 is a wasteful number, since it uses less digits than its factorization.

22161730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 22161730 is about 4707.6246664321. The cubic root of 22161730 is about 280.8888843569. Note that the first 5 decimals are identical.

Adding to 22161730 its reverse (3716122), we get a palindrome (25877852).

The spelling of 22161730 in words is "twenty-two million, one hundred sixty-one thousand, seven hundred thirty".