22381513 has 8 divisors (see below), whose sum is σ = 27904320. Its totient is φ = 17440080.

The previous prime is 22381483. The next prime is 22381517. The reversal of 22381513 is 31518322.

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

It is not a de Polignac number, because 22381513 - 2¹³ = 22373321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22381517) 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, 145258 + ... + 145411.

It is an arithmetic number, because the mean of its divisors is an integer number (3488040).

Almost surely, 2^22381513 is an apocalyptic number.

It is an amenable number.

22381513 is a deficient number, since it is larger than the sum of its proper divisors (5522807).

22381513 is a wasteful number, since it uses less digits than its factorization.

22381513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290687.

The product of its digits is 1440, while the sum is 25.

The square root of 22381513 is about 4730.9103775066. The cubic root of 22381513 is about 281.8143782888.

Adding to 22381513 its reverse (31518322), we get a palindrome (53899835).

The spelling of 22381513 in words is "twenty-two million, three hundred eighty-one thousand, five hundred thirteen".