22478507 has 2 divisors, whose sum is σ = 22478508. Its totient is φ = 22478506.

The previous prime is 22478497. The next prime is 22478513. The reversal of 22478507 is 70587422.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22478507 - 2⁸ = 22478251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22478527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11239253 + 11239254.

It is an arithmetic number, because the mean of its divisors is an integer number (11239254).

Almost surely, 2^22478507 is an apocalyptic number.

22478507 is a deficient number, since it is larger than the sum of its proper divisors (1).

22478507 is an equidigital number, since it uses as much as digits as its factorization.

22478507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 22478507 is about 4741.1503878278. The cubic root of 22478507 is about 282.2208880823.

The spelling of 22478507 in words is "twenty-two million, four hundred seventy-eight thousand, five hundred seven".