55517479 has 2 divisors, whose sum is σ = 55517480. Its totient is φ = 55517478.

The previous prime is 55517471. The next prime is 55517509. The reversal of 55517479 is 97471555.

55517479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55517479 - 2³ = 55517471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55517471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27758739 + 27758740.

It is an arithmetic number, because the mean of its divisors is an integer number (27758740).

Almost surely, 2^55517479 is an apocalyptic number.

55517479 is a deficient number, since it is larger than the sum of its proper divisors (1).

55517479 is an equidigital number, since it uses as much as digits as its factorization.

55517479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 220500, while the sum is 43.

The square root of 55517479 is about 7451.0052341949. The cubic root of 55517479 is about 381.4842207103.

The spelling of 55517479 in words is "fifty-five million, five hundred seventeen thousand, four hundred seventy-nine".