65221464 has 128 divisors (see below), whose sum is σ = 210470400. Its totient is φ = 16343040.

The previous prime is 65221459. The next prime is 65221501. The reversal of 65221464 is 46412256.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52984 + ... + 54200.

It is an arithmetic number, because the mean of its divisors is an integer number (1644300).

Almost surely, 2^65221464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65221464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105235200).

65221464 is an abundant number, since it is smaller than the sum of its proper divisors (145248936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65221464 is a wasteful number, since it uses less digits than its factorization.

65221464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273 (or 1269 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 65221464 is about 8075.9806834836. The cubic root of 65221464 is about 402.5286972068.

The spelling of 65221464 in words is "sixty-five million, two hundred twenty-one thousand, four hundred sixty-four".