2085567021 has 40 divisors (see below), whose sum is σ = 3442215744. Its totient is φ = 1251676800.

The previous prime is 2085567019. The next prime is 2085567023. The reversal of 2085567021 is 1207655802.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2085567019) and next prime (2085567023).

It is not a de Polignac number, because 2085567021 - 2¹ = 2085567019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2085567023) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1255 + ... + 64596.

Almost surely, 2^2085567021 is an apocalyptic number.

It is an amenable number.

2085567021 is a deficient number, since it is larger than the sum of its proper divisors (1356648723).

2085567021 is a wasteful number, since it uses less digits than its factorization.

2085567021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65903 (or 65894 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 2085567021 is about 45668.0087260218. The cubic root of 2085567021 is about 1277.6386765357.

The spelling of 2085567021 in words is "two billion, eighty-five million, five hundred sixty-seven thousand, twenty-one".