55973261 has 4 divisors (see below), whose sum is σ = 56740092. Its totient is φ = 55206432.

The previous prime is 55973249. The next prime is 55973263. The reversal of 55973261 is 16237955.

It is a happy number.

55973261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13801225 + 42172036 = 3715^2 + 6494^2 .

It is a cyclic number.

It is not a de Polignac number, because 55973261 - 2¹⁰ = 55972237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55973263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383306 + ... + 383451.

It is an arithmetic number, because the mean of its divisors is an integer number (14185023).

Almost surely, 2^55973261 is an apocalyptic number.

It is an amenable number.

55973261 is a deficient number, since it is larger than the sum of its proper divisors (766831).

55973261 is an equidigital number, since it uses as much as digits as its factorization.

55973261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766830.

The product of its digits is 56700, while the sum is 38.

The square root of 55973261 is about 7481.5279856457. The cubic root of 55973261 is about 382.5253341615.

The spelling of 55973261 in words is "fifty-five million, nine hundred seventy-three thousand, two hundred sixty-one".