212531142 has 16 divisors (see below), whose sum is σ = 425989872. Its totient is φ = 70689120.

The previous prime is 212531129. The next prime is 212531147. The reversal of 212531142 is 241135212.

It is a super-3 number, since 3×212531142³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212531147) 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, 35653 + ... + 41184.

It is an arithmetic number, because the mean of its divisors is an integer number (26624367).

Almost surely, 2^212531142 is an apocalyptic number.

212531142 is an abundant number, since it is smaller than the sum of its proper divisors (213458730).

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

212531142 is a wasteful number, since it uses less digits than its factorization.

212531142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77303.

The product of its digits is 480, while the sum is 21.

The square root of 212531142 is about 14578.4478597689. The cubic root of 212531142 is about 596.7707454837.

Adding to 212531142 its reverse (241135212), we get a palindrome (453666354).

The spelling of 212531142 in words is "two hundred twelve million, five hundred thirty-one thousand, one hundred forty-two".