22154013 has 32 divisors (see below), whose sum is σ = 37739520. Its totient is φ = 12582000.

The previous prime is 22154003. The next prime is 22154021. The reversal of 22154013 is 31045122.

It is not a de Polignac number, because 22154013 - 2⁴ = 22153997 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22154003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47206 + ... + 47672.

It is an arithmetic number, because the mean of its divisors is an integer number (1179360).

Almost surely, 2^22154013 is an apocalyptic number.

It is an amenable number.

22154013 is a deficient number, since it is larger than the sum of its proper divisors (15585507).

22154013 is a wasteful number, since it uses less digits than its factorization.

22154013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 22154013 is about 4706.8049672788. The cubic root of 22154013 is about 280.8562775287.

Adding to 22154013 its reverse (31045122), we get a palindrome (53199135).

The spelling of 22154013 in words is "twenty-two million, one hundred fifty-four thousand, thirteen".