2171435620 has 12 divisors (see below), whose sum is σ = 4560014844. Its totient is φ = 868574240.

The previous prime is 2171435611. The next prime is 2171435647. The reversal of 2171435620 is 265341712.

It can be written as a sum of positive squares in 2 ways, for example, as 515108416 + 1656327204 = 22696^2 + 40698^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54285871 + ... + 54285910.

It is an arithmetic number, because the mean of its divisors is an integer number (380001237).

Almost surely, 2^2171435620 is an apocalyptic number.

2171435620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2171435620 is an abundant number, since it is smaller than the sum of its proper divisors (2388579224).

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

2171435620 is a wasteful number, since it uses less digits than its factorization.

2171435620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108571790 (or 108571788 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2171435620 is about 46598.6654315336. The cubic root of 2171435620 is about 1294.9380311526.

The spelling of 2171435620 in words is "two billion, one hundred seventy-one million, four hundred thirty-five thousand, six hundred twenty".