285260831 has 2 divisors, whose sum is σ = 285260832. Its totient is φ = 285260830.

The previous prime is 285260819. The next prime is 285260873. The reversal of 285260831 is 138062582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285260831 - 2¹⁴ = 285244447 is a prime.

It is a super-2 number, since 2×285260831² = 162747483405621122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 285260791 and 285260800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285260891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142630415 + 142630416.

It is an arithmetic number, because the mean of its divisors is an integer number (142630416).

Almost surely, 2^285260831 is an apocalyptic number.

285260831 is a deficient number, since it is larger than the sum of its proper divisors (1).

285260831 is an equidigital number, since it uses as much as digits as its factorization.

285260831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 285260831 is about 16889.6663969422. Note that the first 3 decimals coincide. The cubic root of 285260831 is about 658.2851341664.

The spelling of 285260831 in words is "two hundred eighty-five million, two hundred sixty thousand, eight hundred thirty-one".