2015851 has 2 divisors, whose sum is σ = 2015852. Its totient is φ = 2015850.

The previous prime is 2015833. The next prime is 2015861. The reversal of 2015851 is 1585102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2015851 - 2⁹ = 2015339 is a prime.

It is not a weakly prime, because it can be changed into another prime (2015801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007925 + 1007926.

It is an arithmetic number, because the mean of its divisors is an integer number (1007926).

2^2015851 is an apocalyptic number.

2015851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015851 is an equidigital number, since it uses as much as digits as its factorization.

2015851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 2015851 is about 1419.8066769811. The cubic root of 2015851 is about 126.3240796490.

The spelling of 2015851 in words is "two million, fifteen thousand, eight hundred fifty-one".