55045447 has 2 divisors, whose sum is σ = 55045448. Its totient is φ = 55045446.

The previous prime is 55045423. The next prime is 55045453. The reversal of 55045447 is 74454055.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55045447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55045477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27522723 + 27522724.

It is an arithmetic number, because the mean of its divisors is an integer number (27522724).

Almost surely, 2^55045447 is an apocalyptic number.

55045447 is a deficient number, since it is larger than the sum of its proper divisors (1).

55045447 is an equidigital number, since it uses as much as digits as its factorization.

55045447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56000, while the sum is 34.

The square root of 55045447 is about 7419.2618905118. The cubic root of 55045447 is about 380.3999643779.

The spelling of 55045447 in words is "fifty-five million, forty-five thousand, four hundred forty-seven".