53681817 has 8 divisors (see below), whose sum is σ = 81800896. Its totient is φ = 30675312.

The previous prime is 53681809. The next prime is 53681819. The reversal of 53681817 is 71818635.

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

It is not a de Polignac number, because 53681817 - 2³ = 53681809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53681819) 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, 1278118 + ... + 1278159.

It is an arithmetic number, because the mean of its divisors is an integer number (10225112).

Almost surely, 2^53681817 is an apocalyptic number.

It is an amenable number.

53681817 is a deficient number, since it is larger than the sum of its proper divisors (28119079).

53681817 is a wasteful number, since it uses less digits than its factorization.

53681817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556287.

The product of its digits is 40320, while the sum is 39.

The square root of 53681817 is about 7326.7876316978. The cubic root of 53681817 is about 377.2324715921.

The spelling of 53681817 in words is "fifty-three million, six hundred eighty-one thousand, eight hundred seventeen".