22981501 has 4 divisors (see below), whose sum is σ = 24333372. Its totient is φ = 21629632.

The previous prime is 22981499. The next prime is 22981513. The reversal of 22981501 is 10518922.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10208025 + 12773476 = 3195^2 + 3574^2 .

It is a cyclic number.

It is not a de Polignac number, because 22981501 - 2¹ = 22981499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22981501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22981561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675910 + ... + 675943.

It is an arithmetic number, because the mean of its divisors is an integer number (6083343).

Almost surely, 2^22981501 is an apocalyptic number.

It is an amenable number.

22981501 is a deficient number, since it is larger than the sum of its proper divisors (1351871).

22981501 is a wasteful number, since it uses less digits than its factorization.

22981501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351870.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 22981501 is about 4793.9024812776. The cubic root of 22981501 is about 284.3104330489.

The spelling of 22981501 in words is "twenty-two million, nine hundred eighty-one thousand, five hundred one".