22172248 has 32 divisors (see below), whose sum is σ = 47700000. Its totient is φ = 9464832.

The previous prime is 22172209. The next prime is 22172251. The reversal of 22172248 is 84227122.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17128 + ... + 18376.

It is an arithmetic number, because the mean of its divisors is an integer number (1490625).

Almost surely, 2^22172248 is an apocalyptic number.

22172248 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

22172248 is an abundant number, since it is smaller than the sum of its proper divisors (25527752).

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

22172248 is a wasteful number, since it uses less digits than its factorization.

22172248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579 (or 1575 counting only the distinct ones).

The product of its digits is 3584, while the sum is 28.

The square root of 22172248 is about 4708.7416578105. The cubic root of 22172248 is about 280.9333141317.

It can be divided in two parts, 2217 and 2248, that added together give a triangular number (4465 = T₉₄).

The spelling of 22172248 in words is "twenty-two million, one hundred seventy-two thousand, two hundred forty-eight".