55345579 has 2 divisors, whose sum is σ = 55345580. Its totient is φ = 55345578.

The previous prime is 55345559. The next prime is 55345597. The reversal of 55345579 is 97554355.

Together with next prime (55345597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55345579 - 2⁹ = 55345067 is a prime.

It is a super-2 number, since 2×55345579² = 6126266229690482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55345519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27672789 + 27672790.

It is an arithmetic number, because the mean of its divisors is an integer number (27672790).

Almost surely, 2^55345579 is an apocalyptic number.

55345579 is a deficient number, since it is larger than the sum of its proper divisors (1).

55345579 is an equidigital number, since it uses as much as digits as its factorization.

55345579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 472500, while the sum is 43.

The square root of 55345579 is about 7439.4609347721. The cubic root of 55345579 is about 381.0900809545.

The spelling of 55345579 in words is "fifty-five million, three hundred forty-five thousand, five hundred seventy-nine".