65140143 has 16 divisors (see below), whose sum is σ = 88615296. Its totient is φ = 42554720.

The previous prime is 65140139. The next prime is 65140169. The reversal of 65140143 is 34104156.

It is a cyclic number.

It is not a de Polignac number, because 65140143 - 2² = 65140139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65140123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31621 + ... + 33617.

It is an arithmetic number, because the mean of its divisors is an integer number (5538456).

Almost surely, 2^65140143 is an apocalyptic number.

65140143 is a deficient number, since it is larger than the sum of its proper divisors (23475153).

65140143 is a wasteful number, since it uses less digits than its factorization.

65140143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 65140143 is about 8070.9443685358. The cubic root of 65140143 is about 402.3613307788.

Adding to 65140143 its reverse (34104156), we get a palindrome (99244299).

The spelling of 65140143 in words is "sixty-five million, one hundred forty thousand, one hundred forty-three".