55972229 has 2 divisors, whose sum is σ = 55972230. Its totient is φ = 55972228.

The previous prime is 55972223. The next prime is 55972237. The reversal of 55972229 is 92227955.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31696900 + 24275329 = 5630^2 + 4927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55972229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55972223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27986114 + 27986115.

It is an arithmetic number, because the mean of its divisors is an integer number (27986115).

Almost surely, 2^55972229 is an apocalyptic number.

It is an amenable number.

55972229 is a deficient number, since it is larger than the sum of its proper divisors (1).

55972229 is an equidigital number, since it uses as much as digits as its factorization.

55972229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 41.

The square root of 55972229 is about 7481.4590154595. The cubic root of 55972229 is about 382.5229832260.

The spelling of 55972229 in words is "fifty-five million, nine hundred seventy-two thousand, two hundred twenty-nine".