55323187 has 2 divisors, whose sum is σ = 55323188. Its totient is φ = 55323186.

The previous prime is 55323139. The next prime is 55323197. The reversal of 55323187 is 78132355.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55323187 is a prime.

It is not a weakly prime, because it can be changed into another prime (55323137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27661593 + 27661594.

It is an arithmetic number, because the mean of its divisors is an integer number (27661594).

Almost surely, 2^55323187 is an apocalyptic number.

55323187 is a deficient number, since it is larger than the sum of its proper divisors (1).

55323187 is an equidigital number, since it uses as much as digits as its factorization.

55323187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 34.

The square root of 55323187 is about 7437.9558347707. The cubic root of 55323187 is about 381.0386795578.

The spelling of 55323187 in words is "fifty-five million, three hundred twenty-three thousand, one hundred eighty-seven".