55303261 has 16 divisors (see below), whose sum is σ = 65242800. Its totient is φ = 46384128.

The previous prime is 55303253. The next prime is 55303273. The reversal of 55303261 is 16230355.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 632025 + 54671236 = 795^2 + 7394^2 .

It is a cyclic number.

It is not a de Polignac number, because 55303261 - 2³ = 55303253 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 (55303211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2095 + ... + 10723.

It is an arithmetic number, because the mean of its divisors is an integer number (4077675).

Almost surely, 2^55303261 is an apocalyptic number.

It is an amenable number.

55303261 is a deficient number, since it is larger than the sum of its proper divisors (9939539).

55303261 is a wasteful number, since it uses less digits than its factorization.

55303261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8688.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 55303261 is about 7436.6162332071. The cubic root of 55303261 is about 380.9929272620.

The spelling of 55303261 in words is "fifty-five million, three hundred three thousand, two hundred sixty-one".