213031241 has 4 divisors (see below), whose sum is σ = 216642000. Its totient is φ = 209420484.

The previous prime is 213031223. The next prime is 213031271. The reversal of 213031241 is 142130312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213031241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213031271) 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 3 ways as a sum of consecutive naturals, for example, 1805291 + ... + 1805408.

It is an arithmetic number, because the mean of its divisors is an integer number (54160500).

Almost surely, 2^213031241 is an apocalyptic number.

It is an amenable number.

213031241 is a deficient number, since it is larger than the sum of its proper divisors (3610759).

213031241 is an equidigital number, since it uses as much as digits as its factorization.

213031241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3610758.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 213031241 is about 14595.5897791079. The cubic root of 213031241 is about 597.2384583871.

Adding to 213031241 its reverse (142130312), we get a palindrome (355161553).

The spelling of 213031241 in words is "two hundred thirteen million, thirty-one thousand, two hundred forty-one".