212342402 has 4 divisors (see below), whose sum is σ = 318513606. Its totient is φ = 106171200.

The previous prime is 212342369. The next prime is 212342443. The reversal of 212342402 is 204243212.

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., 209062681 + 3279721 = 14459^2 + 1811^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53085599 + ... + 53085602.

Almost surely, 2^212342402 is an apocalyptic number.

212342402 is a deficient number, since it is larger than the sum of its proper divisors (106171204).

212342402 is a wasteful number, since it uses less digits than its factorization.

212342402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106171203.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 212342402 is about 14571.9731676942. The cubic root of 212342402 is about 596.5940374683.

Adding to 212342402 its reverse (204243212), we get a palindrome (416585614).

The spelling of 212342402 in words is "two hundred twelve million, three hundred forty-two thousand, four hundred two".