55342447 has 2 divisors, whose sum is σ = 55342448. Its totient is φ = 55342446.

The previous prime is 55342387. The next prime is 55342457. The reversal of 55342447 is 74424355.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55342447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55342457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27671223 + 27671224.

It is an arithmetic number, because the mean of its divisors is an integer number (27671224).

Almost surely, 2^55342447 is an apocalyptic number.

55342447 is a deficient number, since it is larger than the sum of its proper divisors (1).

55342447 is an equidigital number, since it uses as much as digits as its factorization.

55342447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 34.

The square root of 55342447 is about 7439.2504326713. The cubic root of 55342447 is about 381.0828922042.

The spelling of 55342447 in words is "fifty-five million, three hundred forty-two thousand, four hundred forty-seven".