65215772 has 24 divisors (see below), whose sum is σ = 116292960. Its totient is φ = 31993920.

The previous prime is 65215769. The next prime is 65215781. The reversal of 65215772 is 27751256.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78254 + ... + 79082.

It is an arithmetic number, because the mean of its divisors is an integer number (4845540).

Almost surely, 2^65215772 is an apocalyptic number.

It is an amenable number.

65215772 is a deficient number, since it is larger than the sum of its proper divisors (51077188).

65215772 is a wasteful number, since it uses less digits than its factorization.

65215772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181 (or 1179 counting only the distinct ones).

The product of its digits is 29400, while the sum is 35.

The square root of 65215772 is about 8075.6282727723. The cubic root of 65215772 is about 402.5169870536.

The spelling of 65215772 in words is "sixty-five million, two hundred fifteen thousand, seven hundred seventy-two".