55943287 has 2 divisors, whose sum is σ = 55943288. Its totient is φ = 55943286.

The previous prime is 55943281. The next prime is 55943309. The reversal of 55943287 is 78234955.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55943287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55943281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27971643 + 27971644.

It is an arithmetic number, because the mean of its divisors is an integer number (27971644).

Almost surely, 2^55943287 is an apocalyptic number.

55943287 is a deficient number, since it is larger than the sum of its proper divisors (1).

55943287 is an equidigital number, since it uses as much as digits as its factorization.

55943287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The square root of 55943287 is about 7479.5245169730. The cubic root of 55943287 is about 382.4570404713.

The spelling of 55943287 in words is "fifty-five million, nine hundred forty-three thousand, two hundred eighty-seven".