55000261 has 4 divisors (see below), whose sum is σ = 55567372. Its totient is φ = 54433152.

The previous prime is 55000259. The next prime is 55000277. The reversal of 55000261 is 16200055.

55000261 = 433² + 434² + ... + 626².

It is a happy number.

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 45819361 + 9180900 = 6769^2 + 3030^2 .

It is a cyclic number.

It is not a de Polignac number, because 55000261 - 2¹ = 55000259 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 (55000961) 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, 283410 + ... + 283603.

It is an arithmetic number, because the mean of its divisors is an integer number (13891843).

Almost surely, 2^55000261 is an apocalyptic number.

It is an amenable number.

55000261 is a deficient number, since it is larger than the sum of its proper divisors (567111).

55000261 is an equidigital number, since it uses as much as digits as its factorization.

55000261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567110.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 55000261 is about 7416.2160836912. The cubic root of 55000261 is about 380.2958476331.

The spelling of 55000261 in words is "fifty-five million, two hundred sixty-one", and thus it is an aban number.