55324681 has 4 divisors (see below), whose sum is σ = 58579092. Its totient is φ = 52070272.

The previous prime is 55324673. The next prime is 55324693. The reversal of 55324681 is 18642355.

55324681 = 5259² + 5260².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18642355 = 5 ⋅3728471.

It can be written as a sum of positive squares in 2 ways, for example, as 27667600 + 27657081 = 5260^2 + 5259^2 .

It is a cyclic number.

It is not a de Polignac number, because 55324681 - 2³ = 55324673 is a prime.

It is a super-2 number, since 2×55324681² = 6121640655503522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55324601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1627180 + ... + 1627213.

It is an arithmetic number, because the mean of its divisors is an integer number (14644773).

Almost surely, 2^55324681 is an apocalyptic number.

55324681 is the 5260-th centered square number.

It is an amenable number.

55324681 is a deficient number, since it is larger than the sum of its proper divisors (3254411).

55324681 is a wasteful number, since it uses less digits than its factorization.

55324681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3254410.

The product of its digits is 28800, while the sum is 34.

The square root of 55324681 is about 7438.0562649122. The cubic root of 55324681 is about 381.0421095040.

The spelling of 55324681 in words is "fifty-five million, three hundred twenty-four thousand, six hundred eighty-one".