22991061 has 8 divisors (see below), whose sum is σ = 31174560. Its totient is φ = 15067472.

The previous prime is 22991051. The next prime is 22991063. The reversal of 22991061 is 16019922.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22991061 - 2⁹ = 22990549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22991063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64770 + ... + 65123.

It is an arithmetic number, because the mean of its divisors is an integer number (3896820).

Almost surely, 2^22991061 is an apocalyptic number.

It is an amenable number.

22991061 is a deficient number, since it is larger than the sum of its proper divisors (8183499).

22991061 is a wasteful number, since it uses less digits than its factorization.

22991061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129955.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 22991061 is about 4794.8994775699. The cubic root of 22991061 is about 284.3498507084.

The spelling of 22991061 in words is "twenty-two million, nine hundred ninety-one thousand, sixty-one".