22161488 has 10 divisors (see below), whose sum is σ = 42937914. Its totient is φ = 11080736.

The previous prime is 22161479. The next prime is 22161499. The reversal of 22161488 is 88416122.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18731584 + 3429904 = 4328^2 + 1852^2 .

It is a super-2 number, since 2×22161488² = 982263100748288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692531 + ... + 692562.

Almost surely, 2^22161488 is an apocalyptic number.

It is an amenable number.

22161488 is a deficient number, since it is larger than the sum of its proper divisors (20776426).

22161488 is a wasteful number, since it uses less digits than its factorization.

22161488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385101 (or 1385095 counting only the distinct ones).

The product of its digits is 6144, while the sum is 32.

The square root of 22161488 is about 4707.5989633783. The cubic root of 22161488 is about 280.8878619434.

The spelling of 22161488 in words is "twenty-two million, one hundred sixty-one thousand, four hundred eighty-eight".