55446557 has 2 divisors, whose sum is σ = 55446558. Its totient is φ = 55446556.

The previous prime is 55446551. The next prime is 55446577. The reversal of 55446557 is 75564455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49266361 + 6180196 = 7019^2 + 2486^2 .

It is a cyclic number.

It is not a de Polignac number, because 55446557 - 2¹⁶ = 55381021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55446551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27723278 + 27723279.

It is an arithmetic number, because the mean of its divisors is an integer number (27723279).

Almost surely, 2^55446557 is an apocalyptic number.

It is an amenable number.

55446557 is a deficient number, since it is larger than the sum of its proper divisors (1).

55446557 is an equidigital number, since it uses as much as digits as its factorization.

55446557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420000, while the sum is 41.

The square root of 55446557 is about 7446.2444896740. The cubic root of 55446557 is about 381.3217064085.

The spelling of 55446557 in words is "fifty-five million, four hundred forty-six thousand, five hundred fifty-seven".