213755331 has 16 divisors (see below), whose sum is σ = 302305824. Its totient is φ = 133883904.

The previous prime is 213755329. The next prime is 213755357. The reversal of 213755331 is 133557312.

It is not a de Polignac number, because 213755331 - 2¹ = 213755329 is a prime.

It is a super-2 number, since 2×213755331² = 91382683061839122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213759331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28071 + ... + 34863.

It is an arithmetic number, because the mean of its divisors is an integer number (18894114).

Almost surely, 2^213755331 is an apocalyptic number.

213755331 is a deficient number, since it is larger than the sum of its proper divisors (88550493).

213755331 is a wasteful number, since it uses less digits than its factorization.

213755331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7430.

The product of its digits is 9450, while the sum is 30.

The square root of 213755331 is about 14620.3738324299. The cubic root of 213755331 is about 597.9143613639.

The spelling of 213755331 in words is "two hundred thirteen million, seven hundred fifty-five thousand, three hundred thirty-one".