64313553 has 4 divisors (see below), whose sum is σ = 85751408. Its totient is φ = 42875700.

The previous prime is 64313519. The next prime is 64313563. The reversal of 64313553 is 35531346.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 64313553 - 2⁶ = 64313489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64313553.

It is not an unprimeable number, because it can be changed into a prime (64313563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10718923 + ... + 10718928.

It is an arithmetic number, because the mean of its divisors is an integer number (21437852).

Almost surely, 2^64313553 is an apocalyptic number.

It is an amenable number.

64313553 is a deficient number, since it is larger than the sum of its proper divisors (21437855).

64313553 is a wasteful number, since it uses less digits than its factorization.

64313553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21437854.

The product of its digits is 16200, while the sum is 30.

The square root of 64313553 is about 8019.5731183150. The cubic root of 64313553 is about 400.6521715196.

Adding to 64313553 its reverse (35531346), we get a palindrome (99844899).

It can be divided in two parts, 643 and 13553, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 64313553 in words is "sixty-four million, three hundred thirteen thousand, five hundred fifty-three".