55193647 has 2 divisors, whose sum is σ = 55193648. Its totient is φ = 55193646.

The previous prime is 55193599. The next prime is 55193659. The reversal of 55193647 is 74639155.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55193647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55193447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27596823 + 27596824.

It is an arithmetic number, because the mean of its divisors is an integer number (27596824).

Almost surely, 2^55193647 is an apocalyptic number.

55193647 is a deficient number, since it is larger than the sum of its proper divisors (1).

55193647 is an equidigital number, since it uses as much as digits as its factorization.

55193647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 40.

The square root of 55193647 is about 7429.2426935725. The cubic root of 55193647 is about 380.7410447027.

The spelling of 55193647 in words is "fifty-five million, one hundred ninety-three thousand, six hundred forty-seven".