65138211 has 6 divisors (see below), whose sum is σ = 94088540. Its totient is φ = 43425468.

The previous prime is 65138209. The next prime is 65138221. The reversal of 65138211 is 11283156.

65138211 is a `hidden beast` number, since 651 + 3 + 8 + 2 + 1 + 1 = 666.

It is not a de Polignac number, because 65138211 - 2¹ = 65138209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65138221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3618781 + ... + 3618798.

Almost surely, 2^65138211 is an apocalyptic number.

65138211 is a deficient number, since it is larger than the sum of its proper divisors (28950329).

65138211 is a wasteful number, since it uses less digits than its factorization.

65138211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7237585 (or 7237582 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 65138211 is about 8070.8246790523. The cubic root of 65138211 is about 402.3573528438.

The spelling of 65138211 in words is "sixty-five million, one hundred thirty-eight thousand, two hundred eleven".