65038831 has 24 divisors (see below), whose sum is σ = 77757120. Its totient is φ = 54035520.

The previous prime is 65038829. The next prime is 65038861. The reversal of 65038831 is 13883056.

It is a happy number.

It is not a de Polignac number, because 65038831 - 2¹ = 65038829 is a prime.

It is a super-2 number, since 2×65038831² = 8460099075693122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65038801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 272010 + ... + 272248.

It is an arithmetic number, because the mean of its divisors is an integer number (3239880).

Almost surely, 2^65038831 is an apocalyptic number.

65038831 is a deficient number, since it is larger than the sum of its proper divisors (12718289).

65038831 is a wasteful number, since it uses less digits than its factorization.

65038831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 65038831 is about 8064.6655851312. The cubic root of 65038831 is about 402.1526259726.

The spelling of 65038831 in words is "sixty-five million, thirty-eight thousand, eight hundred thirty-one".