55712197 has 2 divisors, whose sum is σ = 55712198. Its totient is φ = 55712196.

The previous prime is 55712183. The next prime is 55712227. The reversal of 55712197 is 79121755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52504516 + 3207681 = 7246^2 + 1791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55712197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55712897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27856098 + 27856099.

It is an arithmetic number, because the mean of its divisors is an integer number (27856099).

Almost surely, 2^55712197 is an apocalyptic number.

It is an amenable number.

55712197 is a deficient number, since it is larger than the sum of its proper divisors (1).

55712197 is an equidigital number, since it uses as much as digits as its factorization.

55712197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22050, while the sum is 37.

The square root of 55712197 is about 7464.0603561332. The cubic root of 55712197 is about 381.9296970483.

The spelling of 55712197 in words is "fifty-five million, seven hundred twelve thousand, one hundred ninety-seven".