2021055000 has 160 divisors (see below), whose sum is σ = 6411197760. Its totient is φ = 530640000.

The previous prime is 2021054977. The next prime is 2021055017. The reversal of 2021055000 is 5501202.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1003995 + ... + 1006005.

It is an arithmetic number, because the mean of its divisors is an integer number (40069986).

Almost surely, 2^2021055000 is an apocalyptic number.

2021055000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021055000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3205598880).

2021055000 is an abundant number, since it is smaller than the sum of its proper divisors (4390142760).

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

2021055000 is a wasteful number, since it uses less digits than its factorization.

2021055000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107 (or 2088 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 2021055000 is about 44956.1452973895. The cubic root of 2021055000 is about 1264.3268979713.

Adding to 2021055000 its reverse (5501202), we get a palindrome (2026556202).

The spelling of 2021055000 in words is "two billion, twenty-one million, fifty-five thousand".