55532881 has 2 divisors, whose sum is σ = 55532882. Its totient is φ = 55532880.

The previous prime is 55532861. The next prime is 55532891. The reversal of 55532881 is 18823555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44675856 + 10857025 = 6684^2 + 3295^2 .

It is a cyclic number.

It is not a de Polignac number, because 55532881 - 2⁵ = 55532849 is a prime.

It is a super-2 number, since 2×55532881² = 6167801744320322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55532881.

It is not a weakly prime, because it can be changed into another prime (55532821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27766440 + 27766441.

It is an arithmetic number, because the mean of its divisors is an integer number (27766441).

Almost surely, 2^55532881 is an apocalyptic number.

It is an amenable number.

55532881 is a deficient number, since it is larger than the sum of its proper divisors (1).

55532881 is an equidigital number, since it uses as much as digits as its factorization.

55532881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48000, while the sum is 37.

The square root of 55532881 is about 7452.0387143385. The cubic root of 55532881 is about 381.5194953470.

The spelling of 55532881 in words is "fifty-five million, five hundred thirty-two thousand, eight hundred eighty-one".