2171501213 has 16 divisors (see below), whose sum is σ = 2530659456. Its totient is φ = 1824638400.

The previous prime is 2171501207. The next prime is 2171501221. The reversal of 2171501213 is 3121051712.

It is a cyclic number.

It is not a de Polignac number, because 2171501213 - 2¹⁰ = 2171500189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171501243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 760238 + ... + 763088.

It is an arithmetic number, because the mean of its divisors is an integer number (158166216).

Almost surely, 2^2171501213 is an apocalyptic number.

It is an amenable number.

2171501213 is a deficient number, since it is larger than the sum of its proper divisors (359158243).

2171501213 is a wasteful number, since it uses less digits than its factorization.

2171501213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4964.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 2171501213 is about 46599.3692339285. The cubic root of 2171501213 is about 1294.9510698407.

Adding to 2171501213 its reverse (3121051712), we get a palindrome (5292552925).

The spelling of 2171501213 in words is "two billion, one hundred seventy-one million, five hundred one thousand, two hundred thirteen".