22315791 has 4 divisors (see below), whose sum is σ = 29754392. Its totient is φ = 14877192.

The previous prime is 22315739. The next prime is 22315807. The reversal of 22315791 is 19751322.

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

It is not a de Polignac number, because 22315791 - 2⁷ = 22315663 is a prime.

It is a super-3 number, since 3×22315791³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22315721) 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 3 ways as a sum of consecutive naturals, for example, 3719296 + ... + 3719301.

It is an arithmetic number, because the mean of its divisors is an integer number (7438598).

Almost surely, 2^22315791 is an apocalyptic number.

22315791 is a deficient number, since it is larger than the sum of its proper divisors (7438601).

22315791 is an equidigital number, since it uses as much as digits as its factorization.

22315791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7438600.

The product of its digits is 3780, while the sum is 30.

The square root of 22315791 is about 4723.9592504593. The cubic root of 22315791 is about 281.5382640510.

The spelling of 22315791 in words is "twenty-two million, three hundred fifteen thousand, seven hundred ninety-one".