64521053 has 2 divisors, whose sum is σ = 64521054. Its totient is φ = 64521052.

The previous prime is 64521047. The next prime is 64521071. The reversal of 64521053 is 35012546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51868804 + 12652249 = 7202^2 + 3557^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64521053 is a prime.

It is equal to p_3814073 and since 64521053 and 3814073 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64526053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32260526 + 32260527.

It is an arithmetic number, because the mean of its divisors is an integer number (32260527).

Almost surely, 2^64521053 is an apocalyptic number.

It is an amenable number.

64521053 is a deficient number, since it is larger than the sum of its proper divisors (1).

64521053 is an equidigital number, since it uses as much as digits as its factorization.

64521053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 64521053 is about 8032.4997976969. The cubic root of 64521053 is about 401.0825944133.

Adding to 64521053 its reverse (35012546), we get a palindrome (99533599).

The spelling of 64521053 in words is "sixty-four million, five hundred twenty-one thousand, fifty-three".