212656141 has 4 divisors (see below), whose sum is σ = 212694012. Its totient is φ = 212618272.

The previous prime is 212656133. The next prime is 212656201. The reversal of 212656141 is 141656212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 837225 + 211818916 = 915^2 + 14554^2 .

It is a cyclic number.

It is not a de Polignac number, because 212656141 - 2³ = 212656133 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 (212656441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8650 + ... + 22363.

It is an arithmetic number, because the mean of its divisors is an integer number (53173503).

Almost surely, 2^212656141 is an apocalyptic number.

It is an amenable number.

212656141 is a deficient number, since it is larger than the sum of its proper divisors (37871).

212656141 is an equidigital number, since it uses as much as digits as its factorization.

212656141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37870.

The product of its digits is 2880, while the sum is 28.

The square root of 212656141 is about 14582.7343457940. The cubic root of 212656141 is about 596.8877183442.

The spelling of 212656141 in words is "two hundred twelve million, six hundred fifty-six thousand, one hundred forty-one".