2171653028 has 6 divisors (see below), whose sum is σ = 3800392806. Its totient is φ = 1085826512.

The previous prime is 2171653021. The next prime is 2171653067. The reversal of 2171653028 is 8203561712.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1799626084 + 372026944 = 42422^2 + 19288^2 .

It is not an unprimeable number, because it can be changed into a prime (2171653021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271456625 + ... + 271456632.

It is an arithmetic number, because the mean of its divisors is an integer number (633398801).

Almost surely, 2^2171653028 is an apocalyptic number.

It is an amenable number.

2171653028 is a deficient number, since it is larger than the sum of its proper divisors (1628739778).

2171653028 is a wasteful number, since it uses less digits than its factorization.

2171653028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542913261 (or 542913259 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 2171653028 is about 46600.9981438166. The cubic root of 2171653028 is about 1294.9812468774.

The spelling of 2171653028 in words is "two billion, one hundred seventy-one million, six hundred fifty-three thousand, twenty-eight".