556137213 has 4 divisors (see below), whose sum is σ = 741516288. Its totient is φ = 370758140.

The previous prime is 556137199. The next prime is 556137223. The reversal of 556137213 is 312731655.

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 556137213 - 2⁹ = 556136701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556137223) 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, 92689533 + ... + 92689538.

It is an arithmetic number, because the mean of its divisors is an integer number (185379072).

Almost surely, 2^556137213 is an apocalyptic number.

It is an amenable number.

556137213 is a deficient number, since it is larger than the sum of its proper divisors (185379075).

556137213 is a wasteful number, since it uses less digits than its factorization.

556137213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185379074.

The product of its digits is 18900, while the sum is 33.

The square root of 556137213 is about 23582.5616293057. The cubic root of 556137213 is about 822.3574894984.

Adding to 556137213 its reverse (312731655), we get a palindrome (868868868).

It can be divided in two parts, 55613 and 7213, that added together give a palindrome (62826).

The spelling of 556137213 in words is "five hundred fifty-six million, one hundred thirty-seven thousand, two hundred thirteen".