52081831 has 6 divisors (see below), whose sum is σ = 54967632. Its totient is φ = 49340340.

The previous prime is 52081807. The next prime is 52081853. The reversal of 52081831 is 13818025.

It is not a de Polignac number, because 52081831 - 2¹³ = 52073639 is a prime.

It is a super-2 number, since 2×52081831² = 5425034240625122, 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 52081831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52081031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71775 + ... + 72496.

It is an arithmetic number, because the mean of its divisors is an integer number (9161272).

Almost surely, 2^52081831 is an apocalyptic number.

52081831 is a deficient number, since it is larger than the sum of its proper divisors (2885801).

52081831 is a wasteful number, since it uses less digits than its factorization.

52081831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144309 (or 144290 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 52081831 is about 7216.7742794132. The cubic root of 52081831 is about 373.4468048112.

Adding to 52081831 its reverse (13818025), we get a palindrome (65899856).

The spelling of 52081831 in words is "fifty-two million, eighty-one thousand, eight hundred thirty-one".