55315261 has 4 divisors (see below), whose sum is σ = 55348672. Its totient is φ = 55281852.

The previous prime is 55315237. The next prime is 55315279. The reversal of 55315261 is 16251355.

55315261 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55315261 - 2¹¹ = 55313213 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 (55315291) 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, 14085 + ... + 17578.

It is an arithmetic number, because the mean of its divisors is an integer number (13837168).

Almost surely, 2^55315261 is an apocalyptic number.

It is an amenable number.

55315261 is a deficient number, since it is larger than the sum of its proper divisors (33411).

55315261 is a wasteful number, since it uses less digits than its factorization.

55315261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33410.

The product of its digits is 4500, while the sum is 28.

The square root of 55315261 is about 7437.4230080049. The cubic root of 55315261 is about 381.0204819028.

The spelling of 55315261 in words is "fifty-five million, three hundred fifteen thousand, two hundred sixty-one".