4021522056 has 48 divisors (see below), whose sum is σ = 10977408000. Its totient is φ = 1329949152.

The previous prime is 4021521979. The next prime is 4021522061. The reversal of 4021522056 is 6502251204.

4021522056 is a `hidden beast` number, since 402 + 1 + 52 + 205 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210756 + ... + 229043.

It is an arithmetic number, because the mean of its divisors is an integer number (228696000).

Almost surely, 2^4021522056 is an apocalyptic number.

It is an amenable number.

4021522056 is an abundant number, since it is smaller than the sum of its proper divisors (6955885944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4021522056 is a wasteful number, since it uses less digits than its factorization.

4021522056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439938 (or 439931 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 4021522056 is about 63415.4717399469. The cubic root of 4021522056 is about 1590.2429722435.

The spelling of 4021522056 in words is "four billion, twenty-one million, five hundred twenty-two thousand, fifty-six".