212252142 has 16 divisors (see below), whose sum is σ = 442961280. Its totient is φ = 67674552.

The previous prime is 212252137. The next prime is 212252147. The reversal of 212252142 is 241252212.

It is an interprime number because it is at equal distance from previous prime (212252137) and next prime (212252147).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212252147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768892 + ... + 769167.

It is an arithmetic number, because the mean of its divisors is an integer number (27685080).

Almost surely, 2^212252142 is an apocalyptic number.

212252142 is an abundant number, since it is smaller than the sum of its proper divisors (230709138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212252142 is a wasteful number, since it uses less digits than its factorization.

212252142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538087.

The product of its digits is 640, while the sum is 21.

The square root of 212252142 is about 14568.8757973977. The cubic root of 212252142 is about 596.5094944395.

The spelling of 212252142 in words is "two hundred twelve million, two hundred fifty-two thousand, one hundred forty-two".