64222471 has 2 divisors, whose sum is σ = 64222472. Its totient is φ = 64222470.

The previous prime is 64222469. The next prime is 64222507. The reversal of 64222471 is 17422246.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64222471 - 2¹ = 64222469 is a prime.

It is a super-3 number, since 3×64222471³ (a number of 24 digits) contains 333 as substring.

Together with 64222469, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64222771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32111235 + 32111236.

It is an arithmetic number, because the mean of its divisors is an integer number (32111236).

Almost surely, 2^64222471 is an apocalyptic number.

64222471 is a deficient number, since it is larger than the sum of its proper divisors (1).

64222471 is an equidigital number, since it uses as much as digits as its factorization.

64222471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 28.

The square root of 64222471 is about 8013.8923751196. The cubic root of 64222471 is about 400.4629452475.

The spelling of 64222471 in words is "sixty-four million, two hundred twenty-two thousand, four hundred seventy-one".