55427261 has 4 divisors (see below), whose sum is σ = 55503612. Its totient is φ = 55350912.

The previous prime is 55427257. The next prime is 55427303. The reversal of 55427261 is 16272455.

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 38204761 + 17222500 = 6181^2 + 4150^2 .

It is a cyclic number.

It is not a de Polignac number, because 55427261 - 2² = 55427257 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 (55427201) 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, 37076 + ... + 38541.

It is an arithmetic number, because the mean of its divisors is an integer number (13875903).

Almost surely, 2^55427261 is an apocalyptic number.

It is an amenable number.

55427261 is a deficient number, since it is larger than the sum of its proper divisors (76351).

55427261 is an equidigital number, since it uses as much as digits as its factorization.

55427261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76350.

The product of its digits is 16800, while the sum is 32.

The square root of 55427261 is about 7444.9486902194. The cubic root of 55427261 is about 381.2774665870.

The spelling of 55427261 in words is "fifty-five million, four hundred twenty-seven thousand, two hundred sixty-one".