2101550660 has 48 divisors (see below), whose sum is σ = 4818344832. Its totient is φ = 763584000.

The previous prime is 2101550657. The next prime is 2101550663. The reversal of 2101550660 is 660551012.

It is an interprime number because it is at equal distance from previous prime (2101550657) and next prime (2101550663).

It is not an unprimeable number, because it can be changed into a prime (2101550663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338585 + ... + 344735.

It is an arithmetic number, because the mean of its divisors is an integer number (100382184).

Almost surely, 2^2101550660 is an apocalyptic number.

2101550660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101550660 is an abundant number, since it is smaller than the sum of its proper divisors (2716794172).

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

2101550660 is a wasteful number, since it uses less digits than its factorization.

2101550660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7724 (or 7722 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 2101550660 is about 45842.6729150908. The cubic root of 2101550660 is about 1280.8942847216.

The spelling of 2101550660 in words is "two billion, one hundred one million, five hundred fifty thousand, six hundred sixty".