64122271 has 4 divisors (see below), whose sum is σ = 64372032. Its totient is φ = 63872512.

The previous prime is 64122269. The next prime is 64122281. The reversal of 64122271 is 17222146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64122271 - 2¹ = 64122269 is a prime.

It is a super-2 number, since 2×64122271² = 8223331276394882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64122281) 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 in 3 ways as a sum of consecutive naturals, for example, 124495 + ... + 125008.

It is an arithmetic number, because the mean of its divisors is an integer number (16093008).

Almost surely, 2^64122271 is an apocalyptic number.

64122271 is a deficient number, since it is larger than the sum of its proper divisors (249761).

64122271 is a wasteful number, since it uses less digits than its factorization.

64122271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249760.

The product of its digits is 1344, while the sum is 25.

The square root of 64122271 is about 8007.6382910319. The cubic root of 64122271 is about 400.2545692019.

The spelling of 64122271 in words is "sixty-four million, one hundred twenty-two thousand, two hundred seventy-one".