55430261 has 2 divisors, whose sum is σ = 55430262. Its totient is φ = 55430260.

The previous prime is 55430257. The next prime is 55430267. The reversal of 55430261 is 16203455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49210225 + 6220036 = 7015^2 + 2494^2 .

It is a cyclic number.

It is not a de Polignac number, because 55430261 - 2² = 55430257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55430261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55430267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27715130 + 27715131.

It is an arithmetic number, because the mean of its divisors is an integer number (27715131).

Almost surely, 2^55430261 is an apocalyptic number.

It is an amenable number.

55430261 is a deficient number, since it is larger than the sum of its proper divisors (1).

55430261 is an equidigital number, since it uses as much as digits as its factorization.

55430261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 55430261 is about 7445.1501663835. The cubic root of 55430261 is about 381.2843453427.

The spelling of 55430261 in words is "fifty-five million, four hundred thirty thousand, two hundred sixty-one".