52819781 has 8 divisors (see below), whose sum is σ = 61769664. Its totient is φ = 44220960.

The previous prime is 52819777. The next prime is 52819783. The reversal of 52819781 is 18791825.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52819781 - 2² = 52819777 is a prime.

It is a super-2 number, since 2×52819781² = 5579858529775922, 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 (52819783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87440 + ... + 88041.

It is an arithmetic number, because the mean of its divisors is an integer number (7721208).

Almost surely, 2^52819781 is an apocalyptic number.

It is an amenable number.

52819781 is a deficient number, since it is larger than the sum of its proper divisors (8949883).

52819781 is a wasteful number, since it uses less digits than its factorization.

52819781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175531.

The product of its digits is 40320, while the sum is 41.

The square root of 52819781 is about 7267.7218576387. The cubic root of 52819781 is about 375.2023346607.

The spelling of 52819781 in words is "fifty-two million, eight hundred nineteen thousand, seven hundred eighty-one".