22161024 has 48 divisors (see below), whose sum is σ = 63773970. Its totient is φ = 7386624.

The previous prime is 22161023. The next prime is 22161031. The reversal of 22161024 is 42016122.

It can be written as a sum of positive squares in only one way, i.e., 21455424 + 705600 = 4632^2 + 840^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×22161024² = 982221969457152, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22160988 and 22161006.

It is not an unprimeable number, because it can be changed into a prime (22161023) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8467 + ... + 10770.

Almost surely, 2^22161024 is an apocalyptic number.

22161024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22161024 is an abundant number, since it is smaller than the sum of its proper divisors (41612946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22161024 is a wasteful number, since it uses less digits than its factorization.

22161024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19257 (or 19242 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 22161024 is about 4707.5496810974. The cubic root of 22161024 is about 280.8859015925.

Adding to 22161024 its reverse (42016122), we get a palindrome (64177146).

It can be divided in two parts, 2216 and 1024, that added together give a triangular number (3240 = T₈₀).

The spelling of 22161024 in words is "twenty-two million, one hundred sixty-one thousand, twenty-four".