55201261 has 4 divisors (see below), whose sum is σ = 58448412. Its totient is φ = 51954112.

The previous prime is 55201253. The next prime is 55201283. The reversal of 55201261 is 16210255.

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 46498761 + 8702500 = 6819^2 + 2950^2 .

It is a cyclic number.

It is not a de Polignac number, because 55201261 - 2³ = 55201253 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 (55201231) 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, 1623550 + ... + 1623583.

It is an arithmetic number, because the mean of its divisors is an integer number (14612103).

Almost surely, 2^55201261 is an apocalyptic number.

It is an amenable number.

55201261 is a deficient number, since it is larger than the sum of its proper divisors (3247151).

55201261 is a wasteful number, since it uses less digits than its factorization.

55201261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247150.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 55201261 is about 7429.7551103653. The cubic root of 55201261 is about 380.7585517237.

The spelling of 55201261 in words is "fifty-five million, two hundred one thousand, two hundred sixty-one".