55444553 has 2 divisors, whose sum is σ = 55444554. Its totient is φ = 55444552.

The previous prime is 55444541. The next prime is 55444567. The reversal of 55444553 is 35544455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37356544 + 18088009 = 6112^2 + 4253^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55444553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55444573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27722276 + 27722277.

It is an arithmetic number, because the mean of its divisors is an integer number (27722277).

Almost surely, 2^55444553 is an apocalyptic number.

It is an amenable number.

55444553 is a deficient number, since it is larger than the sum of its proper divisors (1).

55444553 is an equidigital number, since it uses as much as digits as its factorization.

55444553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120000, while the sum is 35.

The square root of 55444553 is about 7446.1099239804. The cubic root of 55444553 is about 381.3171123276.

The spelling of 55444553 in words is "fifty-five million, four hundred forty-four thousand, five hundred fifty-three".