55091269 has 2 divisors, whose sum is σ = 55091270. Its totient is φ = 55091268.

The previous prime is 55091177. The next prime is 55091273. The reversal of 55091269 is 96219055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51624225 + 3467044 = 7185^2 + 1862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55091269 is a prime.

It is a super-2 number, since 2×55091269² = 6070095840060722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55091369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27545634 + 27545635.

It is an arithmetic number, because the mean of its divisors is an integer number (27545635).

Almost surely, 2^55091269 is an apocalyptic number.

It is an amenable number.

55091269 is a deficient number, since it is larger than the sum of its proper divisors (1).

55091269 is an equidigital number, since it uses as much as digits as its factorization.

55091269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 55091269 is about 7422.3492911611. The cubic root of 55091269 is about 380.5054884111.

It can be divided in two parts, 550 and 91269, that added together give a palindrome (91819).

The spelling of 55091269 in words is "fifty-five million, ninety-one thousand, two hundred sixty-nine".