213731046 has 24 divisors (see below), whose sum is σ = 463353384. Its totient is φ = 71202240.

The previous prime is 213731041. The next prime is 213731047. The reversal of 213731046 is 640137312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213731041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56061 + ... + 59751.

It is an arithmetic number, because the mean of its divisors is an integer number (19306391).

Almost surely, 2^213731046 is an apocalyptic number.

213731046 is an abundant number, since it is smaller than the sum of its proper divisors (249622338).

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

213731046 is a wasteful number, since it uses less digits than its factorization.

213731046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6916 (or 6913 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 213731046 is about 14619.5432897201. The cubic root of 213731046 is about 597.8917172499.

Adding to 213731046 its reverse (640137312), we get a palindrome (853868358).

The spelling of 213731046 in words is "two hundred thirteen million, seven hundred thirty-one thousand, forty-six".