55597567 has 2 divisors, whose sum is σ = 55597568. Its totient is φ = 55597566.

The previous prime is 55597543. The next prime is 55597573. The reversal of 55597567 is 76579555.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55597567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55597567.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55591567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27798783 + 27798784.

It is an arithmetic number, because the mean of its divisors is an integer number (27798784).

Almost surely, 2^55597567 is an apocalyptic number.

55597567 is a deficient number, since it is larger than the sum of its proper divisors (1).

55597567 is an equidigital number, since it uses as much as digits as its factorization.

55597567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1653750, while the sum is 49.

The square root of 55597567 is about 7456.3776057815. The cubic root of 55597567 is about 381.6675721477.

The spelling of 55597567 in words is "fifty-five million, five hundred ninety-seven thousand, five hundred sixty-seven".