212343131 has 16 divisors (see below), whose sum is σ = 285105408. Its totient is φ = 152733600.

The previous prime is 212343127. The next prime is 212343137. The reversal of 212343131 is 131343212.

It is a cyclic number.

It is not a de Polignac number, because 212343131 - 2² = 212343127 is a prime.

It is a super-2 number, since 2×212343131² = 90179210565766322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212343137) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 105065 + ... + 107066.

It is an arithmetic number, because the mean of its divisors is an integer number (17819088).

Almost surely, 2^212343131 is an apocalyptic number.

212343131 is a deficient number, since it is larger than the sum of its proper divisors (72762277).

212343131 is a wasteful number, since it uses less digits than its factorization.

212343131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212162.

The product of its digits is 432, while the sum is 20.

The square root of 212343131 is about 14571.9981814438. The cubic root of 212343131 is about 596.5947201967.

Adding to 212343131 its reverse (131343212), we get a palindrome (343686343).

It can be divided in two parts, 2123 and 43131, that added together give a palindrome (45254).

The spelling of 212343131 in words is "two hundred twelve million, three hundred forty-three thousand, one hundred thirty-one".