65220947 has 4 divisors (see below), whose sum is σ = 71150136. Its totient is φ = 59291760.

The previous prime is 65220941. The next prime is 65220979. The reversal of 65220947 is 74902256.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 65220947 - 2⁸ = 65220691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65220941) 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, 2964578 + ... + 2964599.

It is an arithmetic number, because the mean of its divisors is an integer number (17787534).

Almost surely, 2^65220947 is an apocalyptic number.

65220947 is a deficient number, since it is larger than the sum of its proper divisors (5929189).

65220947 is a wasteful number, since it uses less digits than its factorization.

65220947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5929188.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 65220947 is about 8075.9486749236. The cubic root of 65220947 is about 402.5276336107.

It can be divided in two parts, 652209 and 47, that added together give a palindrome (652256).

The spelling of 65220947 in words is "sixty-five million, two hundred twenty thousand, nine hundred forty-seven".