65564229 has 4 divisors (see below), whose sum is σ = 87418976. Its totient is φ = 43709484.

The previous prime is 65564221. The next prime is 65564243. The reversal of 65564229 is 92246556.

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 65564229 - 2³ = 65564221 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 (65564221) 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, 10927369 + ... + 10927374.

It is an arithmetic number, because the mean of its divisors is an integer number (21854744).

Almost surely, 2^65564229 is an apocalyptic number.

It is an amenable number.

65564229 is a deficient number, since it is larger than the sum of its proper divisors (21854747).

65564229 is a wasteful number, since it uses less digits than its factorization.

65564229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21854746.

The product of its digits is 129600, while the sum is 39.

The square root of 65564229 is about 8097.1741366973. The cubic root of 65564229 is about 403.2326155333.

The spelling of 65564229 in words is "sixty-five million, five hundred sixty-four thousand, two hundred twenty-nine".