212137031 has 4 divisors (see below), whose sum is σ = 213542064. Its totient is φ = 210732000.

The previous prime is 212137007. The next prime is 212137039. The reversal of 212137031 is 130731212.

212137031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212137031 - 2¹⁴ = 212120647 is a prime.

It is a super-2 number, since 2×212137031² = 90004239842989922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212136994 and 212137012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212137039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702290 + ... + 702591.

It is an arithmetic number, because the mean of its divisors is an integer number (53385516).

Almost surely, 2^212137031 is an apocalyptic number.

212137031 is a deficient number, since it is larger than the sum of its proper divisors (1405033).

212137031 is a wasteful number, since it uses less digits than its factorization.

212137031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1405032.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 212137031 is about 14564.9246822632. The cubic root of 212137031 is about 596.4016396643.

Adding to 212137031 its reverse (130731212), we get a palindrome (342868243).

The spelling of 212137031 in words is "two hundred twelve million, one hundred thirty-seven thousand, thirty-one".