2101553000 has 32 divisors (see below), whose sum is σ = 4917636360. Its totient is φ = 840620800.

The previous prime is 2101552997. The next prime is 2101553009. The reversal of 2101553000 is 3551012.

It can be written as a sum of positive squares in 4 ways, for example, as 1298737444 + 802815556 = 36038^2 + 28334^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2101553000.

It is not an unprimeable number, because it can be changed into a prime (2101553009) 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, 1049777 + ... + 1051776.

Almost surely, 2^2101553000 is an apocalyptic number.

2101553000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101553000 is an abundant number, since it is smaller than the sum of its proper divisors (2816083360).

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

2101553000 is a wasteful number, since it uses less digits than its factorization.

2101553000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101574 (or 2101560 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 2101553000 is about 45842.6984371557. The cubic root of 2101553000 is about 1280.8947601311.

The spelling of 2101553000 in words is "two billion, one hundred one million, five hundred fifty-three thousand".