212161442 has 4 divisors (see below), whose sum is σ = 318242166. Its totient is φ = 106080720.

The previous prime is 212161423. The next prime is 212161451. The reversal of 212161442 is 244161212.

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

It can be written as a sum of positive squares in only one way, i.e., 123632161 + 88529281 = 11119^2 + 9409^2 .

It is an unprimeable number.

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, 53040359 + ... + 53040362.

Almost surely, 2^212161442 is an apocalyptic number.

212161442 is a deficient number, since it is larger than the sum of its proper divisors (106080724).

212161442 is a wasteful number, since it uses less digits than its factorization.

212161442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106080723.

The product of its digits is 768, while the sum is 23.

The square root of 212161442 is about 14565.7626645500. The cubic root of 212161442 is about 596.4245151330.

The spelling of 212161442 in words is "two hundred twelve million, one hundred sixty-one thousand, four hundred forty-two".