210131312 has 40 divisors (see below), whose sum is σ = 427654176. Its totient is φ = 99830016.

The previous prime is 210131269. The next prime is 210131321. The reversal of 210131312 is 213131012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55958 + ... + 59594.

Almost surely, 2^210131312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210131312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213827088).

210131312 is an abundant number, since it is smaller than the sum of its proper divisors (217522864).

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

210131312 is a wasteful number, since it uses less digits than its factorization.

210131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3825 (or 3819 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 210131312 is about 14495.9067325918. The cubic root of 210131312 is about 594.5160596657.

Adding to 210131312 its reverse (213131012), we get a palindrome (423262324).

The spelling of 210131312 in words is "two hundred ten million, one hundred thirty-one thousand, three hundred twelve".