64442533 has 2 divisors, whose sum is σ = 64442534. Its totient is φ = 64442532.

The previous prime is 64442479. The next prime is 64442537. The reversal of 64442533 is 33524446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60186564 + 4255969 = 7758^2 + 2063^2 .

It is a cyclic number.

It is not a de Polignac number, because 64442533 - 2¹⁷ = 64311461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64442495 and 64442504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64442537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32221266 + 32221267.

It is an arithmetic number, because the mean of its divisors is an integer number (32221267).

Almost surely, 2^64442533 is an apocalyptic number.

It is an amenable number.

64442533 is a deficient number, since it is larger than the sum of its proper divisors (1).

64442533 is an equidigital number, since it uses as much as digits as its factorization.

64442533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 31.

The square root of 64442533 is about 8027.6106656962. The cubic root of 64442533 is about 400.9198269247.

Adding to 64442533 its reverse (33524446), we get a palindrome (97966979).

The spelling of 64442533 in words is "sixty-four million, four hundred forty-two thousand, five hundred thirty-three".