64422521 has 8 divisors (see below), whose sum is σ = 69468000. Its totient is φ = 59542560.

The previous prime is 64422511. The next prime is 64422529. The reversal of 64422521 is 12522446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64422521 - 2¹⁴ = 64406137 is a prime.

It is a super-2 number, since 2×64422521² = 8300522423990882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64422529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40571 + ... + 42128.

It is an arithmetic number, because the mean of its divisors is an integer number (8683500).

Almost surely, 2^64422521 is an apocalyptic number.

It is an amenable number.

64422521 is a deficient number, since it is larger than the sum of its proper divisors (5045479).

64422521 is a wasteful number, since it uses less digits than its factorization.

64422521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82759.

The product of its digits is 3840, while the sum is 26.

The square root of 64422521 is about 8026.3641208208. The cubic root of 64422521 is about 400.8783220477.

Adding to 64422521 its reverse (12522446), we get a palindrome (76944967).

The spelling of 64422521 in words is "sixty-four million, four hundred twenty-two thousand, five hundred twenty-one".