65513572 has 12 divisors (see below), whose sum is σ = 117445356. Its totient is φ = 31957760.

The previous prime is 65513557. The next prime is 65513579. The reversal of 65513572 is 27531556.

It can be written as a sum of positive squares in 2 ways, for example, as 39237696 + 26275876 = 6264^2 + 5126^2 .

It is not an unprimeable number, because it can be changed into a prime (65513579) 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, 199573 + ... + 199900.

It is an arithmetic number, because the mean of its divisors is an integer number (9787113).

Almost surely, 2^65513572 is an apocalyptic number.

It is an amenable number.

65513572 is a deficient number, since it is larger than the sum of its proper divisors (51931784).

65513572 is a wasteful number, since it uses less digits than its factorization.

65513572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399518 (or 399516 counting only the distinct ones).

The product of its digits is 31500, while the sum is 34.

The square root of 65513572 is about 8094.0454656494. The cubic root of 65513572 is about 403.1287386789.

The spelling of 65513572 in words is "sixty-five million, five hundred thirteen thousand, five hundred seventy-two".