213240441 has 4 divisors (see below), whose sum is σ = 284320592. Its totient is φ = 142160292.

The previous prime is 213240437. The next prime is 213240473. The reversal of 213240441 is 144042312.

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 not a de Polignac number, because 213240441 - 2² = 213240437 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213240481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35540071 + ... + 35540076.

It is an arithmetic number, because the mean of its divisors is an integer number (71080148).

Almost surely, 2^213240441 is an apocalyptic number.

It is an amenable number.

213240441 is a deficient number, since it is larger than the sum of its proper divisors (71080151).

213240441 is an equidigital number, since it uses as much as digits as its factorization.

213240441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71080150.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 213240441 is about 14602.7545689161. The cubic root of 213240441 is about 597.4338935868.

Adding to 213240441 its reverse (144042312), we get a palindrome (357282753).

The spelling of 213240441 in words is "two hundred thirteen million, two hundred forty thousand, four hundred forty-one".