65221475 has 18 divisors (see below), whose sum is σ = 88408404. Its totient is φ = 47336400.

The previous prime is 65221459. The next prime is 65221501. The reversal of 65221475 is 57412256.

It is not a de Polignac number, because 65221475 - 2⁴ = 65221459 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 133682 + ... + 134168.

It is an arithmetic number, because the mean of its divisors is an integer number (4911578).

Almost surely, 2^65221475 is an apocalyptic number.

65221475 is a deficient number, since it is larger than the sum of its proper divisors (23186929).

65221475 is an equidigital number, since it uses as much as digits as its factorization.

65221475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995 (or 503 counting only the distinct ones).

The product of its digits is 16800, while the sum is 32.

The square root of 65221475 is about 8075.9813645154. The cubic root of 65221475 is about 402.5287198364.

It can be divided in two parts, 6522 and 1475, that added together give a palindrome (7997).

The spelling of 65221475 in words is "sixty-five million, two hundred twenty-one thousand, four hundred seventy-five".