2171257802 has 16 divisors (see below), whose sum is σ = 3759011712. Its totient is φ = 921325200.

The previous prime is 2171257741. The next prime is 2171257831. The reversal of 2171257802 is 2087521712.

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, 766358 + ... + 769185.

It is an arithmetic number, because the mean of its divisors is an integer number (234938232).

Almost surely, 2^2171257802 is an apocalyptic number.

2171257802 is a deficient number, since it is larger than the sum of its proper divisors (1587753910).

2171257802 is a wasteful number, since it uses less digits than its factorization.

2171257802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535653.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 2171257802 is about 46596.7574193742. The cubic root of 2171257802 is about 1294.9026828675.

The spelling of 2171257802 in words is "two billion, one hundred seventy-one million, two hundred fifty-seven thousand, eight hundred two".