64315205 has 4 divisors (see below), whose sum is σ = 77178252. Its totient is φ = 51452160.

The previous prime is 64315201. The next prime is 64315211. The reversal of 64315205 is 50251346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50251346 = 2 ⋅25125673.

It can be written as a sum of positive squares in 2 ways, for example, as 49928356 + 14386849 = 7066^2 + 3793^2 .

It is not a de Polignac number, because 64315205 - 2² = 64315201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64315201) 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, 6431516 + ... + 6431525.

It is an arithmetic number, because the mean of its divisors is an integer number (19294563).

Almost surely, 2^64315205 is an apocalyptic number.

It is an amenable number.

64315205 is a deficient number, since it is larger than the sum of its proper divisors (12863047).

64315205 is a wasteful number, since it uses less digits than its factorization.

64315205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12863046.

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

The square root of 64315205 is about 8019.6761156545. The cubic root of 64315205 is about 400.6556019614.

The spelling of 64315205 in words is "sixty-four million, three hundred fifteen thousand, two hundred five".