2021061256 has 16 divisors (see below), whose sum is σ = 3793328640. Its totient is φ = 1009506960.

The previous prime is 2021061247. The next prime is 2021061271. The reversal of 2021061256 is 6521601202.

It is a self number, because there is not a number n which added to its sum of digits gives 2021061256.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119536 + ... + 135391.

It is an arithmetic number, because the mean of its divisors is an integer number (237083040).

Almost surely, 2^2021061256 is an apocalyptic number.

It is an amenable number.

2021061256 is a deficient number, since it is larger than the sum of its proper divisors (1772267384).

2021061256 is a wasteful number, since it uses less digits than its factorization.

2021061256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255924 (or 255920 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2021061256 is about 44956.2148762549. The cubic root of 2021061256 is about 1264.3282025079.

Adding to 2021061256 its reverse (6521601202), we get a palindrome (8542662458).

The spelling of 2021061256 in words is "two billion, twenty-one million, sixty-one thousand, two hundred fifty-six".