212161057165 has 8 divisors (see below), whose sum is σ = 254961714528. Its totient is φ = 169483215120.

The previous prime is 212161057117. The next prime is 212161057183. The reversal of 212161057165 is 561750161212.

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

It is a de Polignac number, because none of the positive numbers 2^k-212161057165 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 30700027 + ... + 30706936.

It is an arithmetic number, because the mean of its divisors is an integer number (31870214316).

Almost surely, 2^212161057165 is an apocalyptic number.

It is an amenable number.

212161057165 is a deficient number, since it is larger than the sum of its proper divisors (42800657363).

212161057165 is an equidigital number, since it uses as much as digits as its factorization.

212161057165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61407659.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 212161057165 in words is "two hundred twelve billion, one hundred sixty-one million, fifty-seven thousand, one hundred sixty-five".