55482821 has 2 divisors, whose sum is σ = 55482822. Its totient is φ = 55482820.

The previous prime is 55482809. The next prime is 55482893. The reversal of 55482821 is 12828455.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52041796 + 3441025 = 7214^2 + 1855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55482821 is a prime.

It is a super-2 number, since 2×55482821² = 6156686852236082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55482521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27741410 + 27741411.

It is an arithmetic number, because the mean of its divisors is an integer number (27741411).

Almost surely, 2^55482821 is an apocalyptic number.

It is an amenable number.

55482821 is a deficient number, since it is larger than the sum of its proper divisors (1).

55482821 is an equidigital number, since it uses as much as digits as its factorization.

55482821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25600, while the sum is 35.

The square root of 55482821 is about 7448.6791446538. The cubic root of 55482821 is about 381.4048208974.

The spelling of 55482821 in words is "fifty-five million, four hundred eighty-two thousand, eight hundred twenty-one".