4055000021 has 8 divisors (see below), whose sum is σ = 4298080320. Its totient is φ = 3812425408.

The previous prime is 4055000011. The next prime is 4055000077. The reversal of 4055000021 is 1200005504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4055000021 - 2⁶ = 4054999957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4055000011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109841 + ... + 142038.

It is an arithmetic number, because the mean of its divisors is an integer number (537260040).

Almost surely, 2^4055000021 is an apocalyptic number.

It is an amenable number.

4055000021 is a deficient number, since it is larger than the sum of its proper divisors (243080299).

4055000021 is a wasteful number, since it uses less digits than its factorization.

4055000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252843.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 4055000021 is about 63678.8820646217. The cubic root of 4055000021 is about 1594.6435488482.

Adding to 4055000021 its reverse (1200005504), we get a palindrome (5255005525).

The spelling of 4055000021 in words is "four billion, fifty-five million, twenty-one", and thus it is an aban number.