22149771 has 16 divisors (see below), whose sum is σ = 34307328. Its totient is φ = 12448800.

The previous prime is 22149769. The next prime is 22149797. The reversal of 22149771 is 17794122.

It is not a de Polignac number, because 22149771 - 2¹ = 22149769 is a prime.

It is a super-2 number, since 2×22149771² = 981224710704882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22149761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7365 + ... + 9926.

It is an arithmetic number, because the mean of its divisors is an integer number (2144208).

Almost surely, 2^22149771 is an apocalyptic number.

22149771 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

22149771 is a deficient number, since it is larger than the sum of its proper divisors (12157557).

22149771 is a wasteful number, since it uses less digits than its factorization.

22149771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17362.

The product of its digits is 7056, while the sum is 33.

The square root of 22149771 is about 4706.3543215529. The cubic root of 22149771 is about 280.8383504775.

The spelling of 22149771 in words is "twenty-two million, one hundred forty-nine thousand, seven hundred seventy-one".