56172203 has 2 divisors, whose sum is σ = 56172204. Its totient is φ = 56172202.

The previous prime is 56172157. The next prime is 56172223. The reversal of 56172203 is 30227165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56172203 - 2¹⁶ = 56106667 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (56172223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28086101 + 28086102.

It is an arithmetic number, because the mean of its divisors is an integer number (28086102).

Almost surely, 2^56172203 is an apocalyptic number.

56172203 is a deficient number, since it is larger than the sum of its proper divisors (1).

56172203 is an equidigital number, since it uses as much as digits as its factorization.

56172203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 56172203 is about 7494.8117387964. The cubic root of 56172203 is about 382.9779929955.

Adding to 56172203 its reverse (30227165), we get a palindrome (86399368).

The spelling of 56172203 in words is "fifty-six million, one hundred seventy-two thousand, two hundred three".