55148447 has 2 divisors, whose sum is σ = 55148448. Its totient is φ = 55148446.

The previous prime is 55148413. The next prime is 55148479. The reversal of 55148447 is 74484155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55148447 - 2⁶ = 55148383 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55148447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55142447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27574223 + 27574224.

It is an arithmetic number, because the mean of its divisors is an integer number (27574224).

Almost surely, 2^55148447 is an apocalyptic number.

55148447 is a deficient number, since it is larger than the sum of its proper divisors (1).

55148447 is an equidigital number, since it uses as much as digits as its factorization.

55148447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 89600, while the sum is 38.

The square root of 55148447 is about 7426.2000377043. The cubic root of 55148447 is about 380.6370822836.

The spelling of 55148447 in words is "fifty-five million, one hundred forty-eight thousand, four hundred forty-seven".