65325621 has 4 divisors (see below), whose sum is σ = 87100832. Its totient is φ = 43550412.

The previous prime is 65325619. The next prime is 65325641. The reversal of 65325621 is 12652356.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 65325621 - 2¹ = 65325619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65325641) 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, 10887601 + ... + 10887606.

It is an arithmetic number, because the mean of its divisors is an integer number (21775208).

Almost surely, 2^65325621 is an apocalyptic number.

It is an amenable number.

65325621 is a deficient number, since it is larger than the sum of its proper divisors (21775211).

65325621 is a wasteful number, since it uses less digits than its factorization.

65325621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21775210.

The product of its digits is 10800, while the sum is 30.

The square root of 65325621 is about 8082.4266776755. The cubic root of 65325621 is about 402.7428592345.

Adding to 65325621 its reverse (12652356), we get a palindrome (77977977).

The spelling of 65325621 in words is "sixty-five million, three hundred twenty-five thousand, six hundred twenty-one".