816054257 has 8 divisors (see below), whose sum is σ = 826441056. Its totient is φ = 805680832.

The previous prime is 816054233. The next prime is 816054259. The reversal of 816054257 is 752450618.

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

It is a cyclic number.

It is not a de Polignac number, because 816054257 - 2¹² = 816050161 is a prime.

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 816054257.

It is not an unprimeable number, because it can be changed into a prime (816054259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185993 + ... + 190329.

It is an arithmetic number, because the mean of its divisors is an integer number (103305132).

Almost surely, 2^816054257 is an apocalyptic number.

It is an amenable number.

816054257 is a deficient number, since it is larger than the sum of its proper divisors (10386799).

816054257 is a wasteful number, since it uses less digits than its factorization.

816054257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6687.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 816054257 is about 28566.6633858419. The cubic root of 816054257 is about 934.4864565306.

The spelling of 816054257 in words is "eight hundred sixteen million, fifty-four thousand, two hundred fifty-seven".