22513903 has 4 divisors (see below), whose sum is σ = 22527288. Its totient is φ = 22500520.

The previous prime is 22513901. The next prime is 22513919. The reversal of 22513903 is 30931522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30931522 = 2 ⋅15465761.

It is a cyclic number.

It is not a de Polignac number, because 22513903 - 2¹ = 22513901 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22513901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3733 + ... + 7678.

It is an arithmetic number, because the mean of its divisors is an integer number (5631822).

Almost surely, 2^22513903 is an apocalyptic number.

22513903 is a deficient number, since it is larger than the sum of its proper divisors (13385).

22513903 is a wasteful number, since it uses less digits than its factorization.

22513903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13384.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 22513903 is about 4744.8817688115. The cubic root of 22513903 is about 282.3689443535.

The spelling of 22513903 in words is "twenty-two million, five hundred thirteen thousand, nine hundred three".