65220571 has 16 divisors (see below), whose sum is σ = 73624320. Its totient is φ = 57324960.

The previous prime is 65220563. The next prime is 65220599. The reversal of 65220571 is 17502256.

It is a cyclic number.

It is not a de Polignac number, because 65220571 - 2³ = 65220563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65224571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98640 + ... + 99298.

It is an arithmetic number, because the mean of its divisors is an integer number (4601520).

Almost surely, 2^65220571 is an apocalyptic number.

65220571 is a deficient number, since it is larger than the sum of its proper divisors (8403749).

65220571 is a wasteful number, since it uses less digits than its factorization.

65220571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 65220571 is about 8075.9253958912. The cubic root of 65220571 is about 402.5268600827.

The spelling of 65220571 in words is "sixty-five million, two hundred twenty thousand, five hundred seventy-one".