65224621 has 8 divisors (see below), whose sum is σ = 81319104. Its totient is φ = 50824320.

The previous prime is 65224603. The next prime is 65224639. The reversal of 65224621 is 12642256.

It is an interprime number because it is at equal distance from previous prime (65224603) and next prime (65224639).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 65224621 - 2⁷ = 65224493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65224621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65224661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423460 + ... + 423613.

It is an arithmetic number, because the mean of its divisors is an integer number (10164888).

Almost surely, 2^65224621 is an apocalyptic number.

It is an amenable number.

65224621 is a deficient number, since it is larger than the sum of its proper divisors (16094483).

65224621 is a wasteful number, since it uses less digits than its factorization.

65224621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847091.

The product of its digits is 5760, while the sum is 28.

The square root of 65224621 is about 8076.1761372570. The cubic root of 65224621 is about 402.5351918100.

Adding to 65224621 its reverse (12642256), we get a palindrome (77866877).

The spelling of 65224621 in words is "sixty-five million, two hundred twenty-four thousand, six hundred twenty-one".