53731881 has 54 divisors (see below), whose sum is σ = 93832830. Its totient is φ = 29538432.

The previous prime is 53731879. The next prime is 53731891. The reversal of 53731881 is 18813735.

53731881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 21344400 + 32387481 = 4620^2 + 5691^2 .

It is not a de Polignac number, because 53731881 - 2¹ = 53731879 is a prime.

It is a super-2 number, since 2×53731881² = 5774230071596322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53731801) 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 53 ways as a sum of consecutive naturals, for example, 603685 + ... + 603773.

It is an arithmetic number, because the mean of its divisors is an integer number (1737645).

Almost surely, 2^53731881 is an apocalyptic number.

It is an amenable number.

53731881 is a deficient number, since it is larger than the sum of its proper divisors (40100949).

53731881 is a wasteful number, since it uses less digits than its factorization.

53731881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 136 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 53731881 is about 7330.2033396080. The cubic root of 53731881 is about 377.3497049470.

The spelling of 53731881 in words is "fifty-three million, seven hundred thirty-one thousand, eight hundred eighty-one".