65403431 has 8 divisors (see below), whose sum is σ = 66798000. Its totient is φ = 64014912.

The previous prime is 65403413. The next prime is 65403433. The reversal of 65403431 is 13430456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65403431 is a prime.

It is a super-2 number, since 2×65403431² = 8555217573143522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65403431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65403433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25211 + ... + 27683.

It is an arithmetic number, because the mean of its divisors is an integer number (8349750).

Almost surely, 2^65403431 is an apocalyptic number.

65403431 is a deficient number, since it is larger than the sum of its proper divisors (1394569).

65403431 is a wasteful number, since it uses less digits than its factorization.

65403431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3025.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 65403431 is about 8087.2387747611. The cubic root of 65403431 is about 402.9026994704.

Adding to 65403431 its reverse (13430456), we get a palindrome (78833887).

The spelling of 65403431 in words is "sixty-five million, four hundred three thousand, four hundred thirty-one".