55322387 has 2 divisors, whose sum is σ = 55322388. Its totient is φ = 55322386.

The previous prime is 55322339. The next prime is 55322389. The reversal of 55322387 is 78322355.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55322387 - 2¹⁴ = 55306003 is a prime.

Together with 55322389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55322389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27661193 + 27661194.

It is an arithmetic number, because the mean of its divisors is an integer number (27661194).

Almost surely, 2^55322387 is an apocalyptic number.

55322387 is a deficient number, since it is larger than the sum of its proper divisors (1).

55322387 is an equidigital number, since it uses as much as digits as its factorization.

55322387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 35.

The square root of 55322387 is about 7437.9020563597. The cubic root of 55322387 is about 381.0368428812.

The spelling of 55322387 in words is "fifty-five million, three hundred twenty-two thousand, three hundred eighty-seven".