556521941 has 4 divisors (see below), whose sum is σ = 556677132. Its totient is φ = 556366752.

The previous prime is 556521893. The next prime is 556521943. The reversal of 556521941 is 149125655.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 329567716 + 226954225 = 18154^2 + 15065^2 .

It is a cyclic number.

It is not a de Polignac number, because 556521941 - 2¹⁰ = 556520917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 556521895 and 556521904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (556521943) 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, 72086 + ... + 79431.

It is an arithmetic number, because the mean of its divisors is an integer number (139169283).

Almost surely, 2^556521941 is an apocalyptic number.

It is an amenable number.

556521941 is a deficient number, since it is larger than the sum of its proper divisors (155191).

556521941 is a wasteful number, since it uses less digits than its factorization.

556521941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155190.

The product of its digits is 54000, while the sum is 38.

The square root of 556521941 is about 23590.7172633644. The cubic root of 556521941 is about 822.5470776169.

The spelling of 556521941 in words is "five hundred fifty-six million, five hundred twenty-one thousand, nine hundred forty-one".