22313791 has 2 divisors, whose sum is σ = 22313792. Its totient is φ = 22313790.

The previous prime is 22313779. The next prime is 22313821. The reversal of 22313791 is 19731322.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22313791 - 2¹¹ = 22311743 is a prime.

It is a super-3 number, since 3×22313791³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22313761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11156895 + 11156896.

It is an arithmetic number, because the mean of its divisors is an integer number (11156896).

Almost surely, 2^22313791 is an apocalyptic number.

22313791 is a deficient number, since it is larger than the sum of its proper divisors (1).

22313791 is an equidigital number, since it uses as much as digits as its factorization.

22313791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 28.

The square root of 22313791 is about 4723.7475588774. The cubic root of 22313791 is about 281.5298530660.

It can be divided in two parts, 22313 and 791, that added together give a square (23104 = 152²).

The spelling of 22313791 in words is "twenty-two million, three hundred thirteen thousand, seven hundred ninety-one".