2171555488 has 48 divisors (see below), whose sum is σ = 4570001856. Its totient is φ = 1013224960.

The previous prime is 2171555479. The next prime is 2171555509. The reversal of 2171555488 is 8845551712.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5806 + ... + 66157.

It is an arithmetic number, because the mean of its divisors is an integer number (95208372).

Almost surely, 2^2171555488 is an apocalyptic number.

It is an amenable number.

2171555488 is an abundant number, since it is smaller than the sum of its proper divisors (2398446368).

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

2171555488 is a wasteful number, since it uses less digits than its factorization.

2171555488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72037 (or 72029 counting only the distinct ones).

The product of its digits is 448000, while the sum is 46.

The square root of 2171555488 is about 46599.9515879577. The cubic root of 2171555488 is about 1294.9618585190.

The spelling of 2171555488 in words is "two billion, one hundred seventy-one million, five hundred fifty-five thousand, four hundred eighty-eight".