65431263 has 4 divisors (see below), whose sum is σ = 87241688. Its totient is φ = 43620840.

The previous prime is 65431243. The next prime is 65431271. The reversal of 65431263 is 36213456.

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

It is not a de Polignac number, because 65431263 - 2⁶ = 65431199 is a prime.

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 65431263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65431213) 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, 10905208 + ... + 10905213.

It is an arithmetic number, because the mean of its divisors is an integer number (21810422).

Almost surely, 2^65431263 is an apocalyptic number.

65431263 is a deficient number, since it is larger than the sum of its proper divisors (21810425).

65431263 is a wasteful number, since it uses less digits than its factorization.

65431263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21810424.

The product of its digits is 12960, while the sum is 30.

The square root of 65431263 is about 8088.9593273795. The cubic root of 65431263 is about 402.9598422304.

The spelling of 65431263 in words is "sixty-five million, four hundred thirty-one thousand, two hundred sixty-three".