52037681 has 4 divisors (see below), whose sum is σ = 52325364. Its totient is φ = 51750000.

The previous prime is 52037659. The next prime is 52037693. The reversal of 52037681 is 18673025.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3610000 + 48427681 = 1900^2 + 6959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52037681 is a prime.

It is a super-2 number, since 2×52037681² = 5415840487715522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52037621) 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, 143570 + ... + 143931.

It is an arithmetic number, because the mean of its divisors is an integer number (13081341).

Almost surely, 2^52037681 is an apocalyptic number.

It is an amenable number.

52037681 is a deficient number, since it is larger than the sum of its proper divisors (287683).

52037681 is a wasteful number, since it uses less digits than its factorization.

52037681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287682.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 52037681 is about 7213.7147850466. The cubic root of 52037681 is about 373.3412508064.

The spelling of 52037681 in words is "fifty-two million, thirty-seven thousand, six hundred eighty-one".