65040431 has 4 divisors (see below), whose sum is σ = 65275512. Its totient is φ = 64805352.

The previous prime is 65040379. The next prime is 65040499. The reversal of 65040431 is 13404056.

It is a happy number.

65040431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 65040431 - 2²² = 60846127 is a prime.

It is a super-2 number, since 2×65040431² = 8460515329331522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65040397 and 65040406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65040631) 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, 117125 + ... + 117678.

It is an arithmetic number, because the mean of its divisors is an integer number (16318878).

Almost surely, 2^65040431 is an apocalyptic number.

65040431 is a deficient number, since it is larger than the sum of its proper divisors (235081).

65040431 is a wasteful number, since it uses less digits than its factorization.

65040431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235080.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 65040431 is about 8064.7647826828. The cubic root of 65040431 is about 402.1559236894.

Adding to 65040431 its reverse (13404056), we get a palindrome (78444487).

The spelling of 65040431 in words is "sixty-five million, forty thousand, four hundred thirty-one".