2212161657 has 8 divisors (see below), whose sum is σ = 2957251584. Its totient is φ = 1470923088.

The previous prime is 2212161641. The next prime is 2212161671. The reversal of 2212161657 is 7561612122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2212161657 - 2⁴ = 2212161641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2212161257) 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 7 ways as a sum of consecutive naturals, for example, 961498 + ... + 963795.

It is an arithmetic number, because the mean of its divisors is an integer number (369656448).

Almost surely, 2^2212161657 is an apocalyptic number.

It is an amenable number.

2212161657 is a deficient number, since it is larger than the sum of its proper divisors (745089927).

2212161657 is a wasteful number, since it uses less digits than its factorization.

2212161657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1925679.

The product of its digits is 10080, while the sum is 33.

The square root of 2212161657 is about 47033.6226225452. The cubic root of 2212161657 is about 1302.9836120063.

Adding to 2212161657 its reverse (7561612122), we get a palindrome (9773773779).

The spelling of 2212161657 in words is "two billion, two hundred twelve million, one hundred sixty-one thousand, six hundred fifty-seven".