56161213 has 4 divisors (see below), whose sum is σ = 56952288. Its totient is φ = 55370140.

The previous prime is 56161211. The next prime is 56161219. The reversal of 56161213 is 31216165.

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 56161213 - 2¹ = 56161211 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 (56161211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395431 + ... + 395572.

It is an arithmetic number, because the mean of its divisors is an integer number (14238072).

Almost surely, 2^56161213 is an apocalyptic number.

It is an amenable number.

56161213 is a deficient number, since it is larger than the sum of its proper divisors (791075).

56161213 is an equidigital number, since it uses as much as digits as its factorization.

56161213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791074.

The product of its digits is 1080, while the sum is 25.

The square root of 56161213 is about 7494.0785290788. The cubic root of 56161213 is about 382.9530150263.

Adding to 56161213 its reverse (31216165), we get a palindrome (87377378).

The spelling of 56161213 in words is "fifty-six million, one hundred sixty-one thousand, two hundred thirteen".