22513745 has 8 divisors (see below), whose sum is σ = 27397440. Its totient is φ = 17757040.

The previous prime is 22513741. The next prime is 22513769. The reversal of 22513745 is 54731522.

It is a happy number.

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

It is not a de Polignac number, because 22513745 - 2² = 22513741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22513741) 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 7 ways as a sum of consecutive naturals, for example, 31355 + ... + 32064.

It is an arithmetic number, because the mean of its divisors is an integer number (3424680).

Almost surely, 2^22513745 is an apocalyptic number.

It is an amenable number.

22513745 is a deficient number, since it is larger than the sum of its proper divisors (4883695).

22513745 is an equidigital number, since it uses as much as digits as its factorization.

22513745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63495.

The product of its digits is 8400, while the sum is 29.

The square root of 22513745 is about 4744.8651192631. The cubic root of 22513745 is about 282.3682838077.

The spelling of 22513745 in words is "twenty-two million, five hundred thirteen thousand, seven hundred forty-five".