55500047 has 2 divisors, whose sum is σ = 55500048. Its totient is φ = 55500046.

The previous prime is 55500041. The next prime is 55500077. The reversal of 55500047 is 74000555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55500047 - 2⁴ = 55500031 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55499989 and 55500025.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55500041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27750023 + 27750024.

It is an arithmetic number, because the mean of its divisors is an integer number (27750024).

Almost surely, 2^55500047 is an apocalyptic number.

55500047 is a deficient number, since it is larger than the sum of its proper divisors (1).

55500047 is an equidigital number, since it uses as much as digits as its factorization.

55500047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 55500047 is about 7449.8353673085. The cubic root of 55500047 is about 381.4442889676. Note that the first 3 decimals are identical.

The spelling of 55500047 in words is "fifty-five million, five hundred thousand, forty-seven".