55287269 has 4 divisors (see below), whose sum is σ = 55407660. Its totient is φ = 55166880.

The previous prime is 55287259. The next prime is 55287313. The reversal of 55287269 is 96278255.

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 15760900 + 39526369 = 3970^2 + 6287^2 .

It is a cyclic number.

It is not a de Polignac number, because 55287269 - 2⁸ = 55287013 is a prime.

It is a super-2 number, since 2×55287269² = 6113364226956722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55287259) 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, 59504 + ... + 60425.

It is an arithmetic number, because the mean of its divisors is an integer number (13851915).

Almost surely, 2^55287269 is an apocalyptic number.

It is an amenable number.

55287269 is a deficient number, since it is larger than the sum of its proper divisors (120391).

55287269 is a wasteful number, since it uses less digits than its factorization.

55287269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120390.

The product of its digits is 302400, while the sum is 44.

The square root of 55287269 is about 7435.5409352649. The cubic root of 55287269 is about 380.9561999143.

The spelling of 55287269 in words is "fifty-five million, two hundred eighty-seven thousand, two hundred sixty-nine".