65211730 has 32 divisors (see below), whose sum is σ = 122553648. Its totient is φ = 24960000.

The previous prime is 65211721. The next prime is 65211733. The reversal of 65211730 is 3711256.

65211730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 18740241 + 46471489 = 4329^2 + 6817^2 .

It is a junction number, because it is equal to n+sod(n) for n = 65211695 and 65211704.

It is not an unprimeable number, because it can be changed into a prime (65211733) 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 15 ways as a sum of consecutive naturals, for example, 20230 + ... + 23230.

Almost surely, 2^65211730 is an apocalyptic number.

65211730 is a deficient number, since it is larger than the sum of its proper divisors (57341918).

65211730 is a wasteful number, since it uses less digits than its factorization.

65211730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 65211730 is about 8075.3780097281. The cubic root of 65211730 is about 402.5086710322.

Adding to 65211730 its reverse (3711256), we get a palindrome (68922986).

The spelling of 65211730 in words is "sixty-five million, two hundred eleven thousand, seven hundred thirty".