2088540221 has 4 divisors (see below), whose sum is σ = 2144987292. Its totient is φ = 2032093152.

The previous prime is 2088540217. The next prime is 2088540257. The reversal of 2088540221 is 1220458802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1970383321 + 118156900 = 44389^2 + 10870^2 .

It is a cyclic number.

It is not a de Polignac number, because 2088540221 - 2² = 2088540217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2088540121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28223480 + ... + 28223553.

It is an arithmetic number, because the mean of its divisors is an integer number (536246823).

Almost surely, 2^2088540221 is an apocalyptic number.

It is an amenable number.

2088540221 is a deficient number, since it is larger than the sum of its proper divisors (56447071).

2088540221 is an equidigital number, since it uses as much as digits as its factorization.

2088540221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56447070.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 2088540221 is about 45700.5494605918. The cubic root of 2088540221 is about 1278.2455253468.

The spelling of 2088540221 in words is "two billion, eighty-eight million, five hundred forty thousand, two hundred twenty-one".