2171256532 has 6 divisors (see below), whose sum is σ = 3799698938. Its totient is φ = 1085628264.

The previous prime is 2171256481. The next prime is 2171256539. The reversal of 2171256532 is 2356521712.

2171256532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1174844176 + 996412356 = 34276^2 + 31566^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171256539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271407063 + ... + 271407070.

Almost surely, 2^2171256532 is an apocalyptic number.

It is an amenable number.

2171256532 is a deficient number, since it is larger than the sum of its proper divisors (1628442406).

2171256532 is a wasteful number, since it uses less digits than its factorization.

2171256532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542814137 (or 542814135 counting only the distinct ones).

The product of its digits is 25200, while the sum is 34.

The square root of 2171256532 is about 46596.7437918145. The cubic root of 2171256532 is about 1294.9024303984.

The spelling of 2171256532 in words is "two billion, one hundred seventy-one million, two hundred fifty-six thousand, five hundred thirty-two".