64430253 has 12 divisors (see below), whose sum is σ = 93737280. Its totient is φ = 42643656.

The previous prime is 64430251. The next prime is 64430263. The reversal of 64430253 is 35203446.

It is not a de Polignac number, because 64430253 - 2¹ = 64430251 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64430251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24501 + ... + 27002.

It is an arithmetic number, because the mean of its divisors is an integer number (7811440).

Almost surely, 2^64430253 is an apocalyptic number.

It is an amenable number.

64430253 is a deficient number, since it is larger than the sum of its proper divisors (29307027).

64430253 is a wasteful number, since it uses less digits than its factorization.

64430253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51648 (or 51645 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 64430253 is about 8026.8457690428. The cubic root of 64430253 is about 400.8943592302.

Adding to 64430253 its reverse (35203446), we get a palindrome (99633699).

The spelling of 64430253 in words is "sixty-four million, four hundred thirty thousand, two hundred fifty-three".