22378313 has 2 divisors, whose sum is σ = 22378314. Its totient is φ = 22378312.

The previous prime is 22378283. The next prime is 22378319. The reversal of 22378313 is 31387322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20043529 + 2334784 = 4477^2 + 1528^2 .

It is a cyclic number.

It is not a de Polignac number, because 22378313 - 2¹² = 22374217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22378319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11189156 + 11189157.

It is an arithmetic number, because the mean of its divisors is an integer number (11189157).

Almost surely, 2^22378313 is an apocalyptic number.

It is an amenable number.

22378313 is a deficient number, since it is larger than the sum of its proper divisors (1).

22378313 is an equidigital number, since it uses as much as digits as its factorization.

22378313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 29.

The square root of 22378313 is about 4730.5721641256. The cubic root of 22378313 is about 281.8009468317.

Subtracting 22378313 from its reverse (31387322), we obtain a palindrome (9009009).

The spelling of 22378313 in words is "twenty-two million, three hundred seventy-eight thousand, three hundred thirteen".