212010506 has 4 divisors (see below), whose sum is σ = 318015762. Its totient is φ = 106005252.

The previous prime is 212010499. The next prime is 212010523. The reversal of 212010506 is 605010212.

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., 204747481 + 7263025 = 14309^2 + 2695^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53002625 + ... + 53002628.

Almost surely, 2^212010506 is an apocalyptic number.

212010506 is a deficient number, since it is larger than the sum of its proper divisors (106005256).

212010506 is a wasteful number, since it uses less digits than its factorization.

212010506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106005255.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 212010506 is about 14560.5805516126. The cubic root of 212010506 is about 596.2830453698.

Adding to 212010506 its reverse (605010212), we get a palindrome (817020718).

The spelling of 212010506 in words is "two hundred twelve million, ten thousand, five hundred six".