22721467 has 2 divisors, whose sum is σ = 22721468. Its totient is φ = 22721466.

The previous prime is 22721437. The next prime is 22721483. The reversal of 22721467 is 76412722.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22721467 is a prime.

It is not a weakly prime, because it can be changed into another prime (22721417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11360733 + 11360734.

It is an arithmetic number, because the mean of its divisors is an integer number (11360734).

Almost surely, 2^22721467 is an apocalyptic number.

22721467 is a deficient number, since it is larger than the sum of its proper divisors (1).

22721467 is an equidigital number, since it uses as much as digits as its factorization.

22721467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 31.

The square root of 22721467 is about 4766.7039975228. The cubic root of 22721467 is about 283.2340457955.

The spelling of 22721467 in words is "twenty-two million, seven hundred twenty-one thousand, four hundred sixty-seven".