55045387 has 2 divisors, whose sum is σ = 55045388. Its totient is φ = 55045386.

The previous prime is 55045379. The next prime is 55045409. The reversal of 55045387 is 78354055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55045387 - 2³ = 55045379 is a prime.

It is not a weakly prime, because it can be changed into another prime (55045357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27522693 + 27522694.

It is an arithmetic number, because the mean of its divisors is an integer number (27522694).

Almost surely, 2^55045387 is an apocalyptic number.

55045387 is a deficient number, since it is larger than the sum of its proper divisors (1).

55045387 is an equidigital number, since it uses as much as digits as its factorization.

55045387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 55045387 is about 7419.2578469817. The cubic root of 55045387 is about 380.3998261648.

The spelling of 55045387 in words is "fifty-five million, forty-five thousand, three hundred eighty-seven".