213031041 has 4 divisors (see below), whose sum is σ = 284041392. Its totient is φ = 142020692.

The previous prime is 213031031. The next prime is 213031043. The reversal of 213031041 is 140130312.

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 not a de Polignac number, because 213031041 - 2¹⁵ = 212998273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213031041.

It is not an unprimeable number, because it can be changed into a prime (213031043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35505171 + ... + 35505176.

It is an arithmetic number, because the mean of its divisors is an integer number (71010348).

Almost surely, 2^213031041 is an apocalyptic number.

It is an amenable number.

213031041 is a deficient number, since it is larger than the sum of its proper divisors (71010351).

213031041 is an equidigital number, since it uses as much as digits as its factorization.

213031041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71010350.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 213031041 is about 14595.5829277217. The cubic root of 213031041 is about 597.2382714854.

Adding to 213031041 its reverse (140130312), we get a palindrome (353161353).

The spelling of 213031041 in words is "two hundred thirteen million, thirty-one thousand, forty-one".