65215532 has 12 divisors (see below), whose sum is σ = 116061960. Its totient is φ = 32054976.

The previous prime is 65215531. The next prime is 65215547. The reversal of 65215532 is 23551256.

It is a happy number.

65215532 is digitally balanced in base 2 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×65215532² = 8506131228086048, which contains 22 as substring.

65215532 is strictly pandigital in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 65215495 and 65215504.

It is not an unprimeable number, because it can be changed into a prime (65215531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137933 + ... + 138404.

It is an arithmetic number, because the mean of its divisors is an integer number (9671830).

Almost surely, 2^65215532 is an apocalyptic number.

It is an amenable number.

65215532 is a deficient number, since it is larger than the sum of its proper divisors (50846428).

65215532 is a wasteful number, since it uses less digits than its factorization.

65215532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276400 (or 276398 counting only the distinct ones).

The product of its digits is 9000, while the sum is 29.

The square root of 65215532 is about 8075.6134132337. The cubic root of 65215532 is about 402.5164932866.

Adding to 65215532 its reverse (23551256), we get a palindrome (88766788).

The spelling of 65215532 in words is "sixty-five million, two hundred fifteen thousand, five hundred thirty-two".