275991851 has 2 divisors, whose sum is σ = 275991852. Its totient is φ = 275991850.

The previous prime is 275991847. The next prime is 275991857. The reversal of 275991851 is 158199572.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 275991851 - 2² = 275991847 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 275991796 and 275991805.

It is not a weakly prime, because it can be changed into another prime (275991857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137995925 + 137995926.

It is an arithmetic number, because the mean of its divisors is an integer number (137995926).

Almost surely, 2^275991851 is an apocalyptic number.

275991851 is a deficient number, since it is larger than the sum of its proper divisors (1).

275991851 is an equidigital number, since it uses as much as digits as its factorization.

275991851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 47.

The square root of 275991851 is about 16613.0024679466. The cubic root of 275991851 is about 651.0765992690.

The spelling of 275991851 in words is "two hundred seventy-five million, nine hundred ninety-one thousand, eight hundred fifty-one".