521213141 has 4 divisors (see below), whose sum is σ = 521744352. Its totient is φ = 520681932.

The previous prime is 521213093. The next prime is 521213159. The reversal of 521213141 is 141312125.

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-521213141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521210141) 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, 264131 + ... + 266096.

It is an arithmetic number, because the mean of its divisors is an integer number (130436088).

Almost surely, 2^521213141 is an apocalyptic number.

It is an amenable number.

521213141 is a deficient number, since it is larger than the sum of its proper divisors (531211).

521213141 is an equidigital number, since it uses as much as digits as its factorization.

521213141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531210.

The product of its digits is 240, while the sum is 20.

The square root of 521213141 is about 22830.0928819836. The cubic root of 521213141 is about 804.7700131287.

Adding to 521213141 its reverse (141312125), we get a palindrome (662525266).

The spelling of 521213141 in words is "five hundred twenty-one million, two hundred thirteen thousand, one hundred forty-one".