65431123 has 4 divisors (see below), whose sum is σ = 65796840. Its totient is φ = 65065408.

The previous prime is 65431103. The next prime is 65431139. The reversal of 65431123 is 32113456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65431123 - 2⁹ = 65430611 is a prime.

It is a super-2 number, since 2×65431123² = 8562463714082258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65431103) 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, 182590 + ... + 182947.

It is an arithmetic number, because the mean of its divisors is an integer number (16449210).

Almost surely, 2^65431123 is an apocalyptic number.

65431123 is a deficient number, since it is larger than the sum of its proper divisors (365717).

65431123 is a wasteful number, since it uses less digits than its factorization.

65431123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365716.

The product of its digits is 2160, while the sum is 25.

The square root of 65431123 is about 8088.9506736041. The cubic root of 65431123 is about 402.9595548325.

Adding to 65431123 its reverse (32113456), we get a palindrome (97544579).

The spelling of 65431123 in words is "sixty-five million, four hundred thirty-one thousand, one hundred twenty-three".