55385579 has 2 divisors, whose sum is σ = 55385580. Its totient is φ = 55385578.

The previous prime is 55385573. The next prime is 55385593. The reversal of 55385579 is 97558355.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55385579 is a prime.

It is a super-2 number, since 2×55385579² = 6135124722330482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55385573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27692789 + 27692790.

It is an arithmetic number, because the mean of its divisors is an integer number (27692790).

Almost surely, 2^55385579 is an apocalyptic number.

55385579 is a deficient number, since it is larger than the sum of its proper divisors (1).

55385579 is an equidigital number, since it uses as much as digits as its factorization.

55385579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 945000, while the sum is 47.

The square root of 55385579 is about 7442.1488160343. The cubic root of 55385579 is about 381.1818674630.

The spelling of 55385579 in words is "fifty-five million, three hundred eighty-five thousand, five hundred seventy-nine".