55280047 has 2 divisors, whose sum is σ = 55280048. Its totient is φ = 55280046.

The previous prime is 55280023. The next prime is 55280077. The reversal of 55280047 is 74008255.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55280047 - 2¹⁵ = 55247279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55280077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27640023 + 27640024.

It is an arithmetic number, because the mean of its divisors is an integer number (27640024).

Almost surely, 2^55280047 is an apocalyptic number.

55280047 is a deficient number, since it is larger than the sum of its proper divisors (1).

55280047 is an equidigital number, since it uses as much as digits as its factorization.

55280047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 55280047 is about 7435.0552788799. The cubic root of 55280047 is about 380.9396114934.

The spelling of 55280047 in words is "fifty-five million, two hundred eighty thousand, forty-seven".