855933251 has 2 divisors, whose sum is σ = 855933252. Its totient is φ = 855933250.

The previous prime is 855933233. The next prime is 855933257. The reversal of 855933251 is 152339558.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855933251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 855933199 and 855933208.

It is not a weakly prime, because it can be changed into another prime (855933257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427966625 + 427966626.

It is an arithmetic number, because the mean of its divisors is an integer number (427966626).

Almost surely, 2^855933251 is an apocalyptic number.

855933251 is a deficient number, since it is larger than the sum of its proper divisors (1).

855933251 is an equidigital number, since it uses as much as digits as its factorization.

855933251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162000, while the sum is 41.

The square root of 855933251 is about 29256.3369374910. The cubic root of 855933251 is about 949.4671992993.

The spelling of 855933251 in words is "eight hundred fifty-five million, nine hundred thirty-three thousand, two hundred fifty-one".