55510261 has 2 divisors, whose sum is σ = 55510262. Its totient is φ = 55510260.

The previous prime is 55510241. The next prime is 55510271. The reversal of 55510261 is 16201555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49084036 + 6426225 = 7006^2 + 2535^2 .

It is a cyclic number.

It is not a de Polignac number, because 55510261 - 2⁹ = 55509749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55510211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27755130 + 27755131.

It is an arithmetic number, because the mean of its divisors is an integer number (27755131).

Almost surely, 2^55510261 is an apocalyptic number.

It is an amenable number.

55510261 is a deficient number, since it is larger than the sum of its proper divisors (1).

55510261 is an equidigital number, since it uses as much as digits as its factorization.

55510261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 55510261 is about 7450.5208542759. The cubic root of 55510261 is about 381.4676873441.

It can be divided in two parts, 555 and 10261, that added together give a square (10816 = 104²).

The spelling of 55510261 in words is "fifty-five million, five hundred ten thousand, two hundred sixty-one".