55287293 has 8 divisors (see below), whose sum is σ = 56715648. Its totient is φ = 53865504.

The previous prime is 55287259. The next prime is 55287313. The reversal of 55287293 is 39278255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55287293 - 2¹² = 55283197 is a 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 55287293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55286293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18521 + ... + 21297.

It is an arithmetic number, because the mean of its divisors is an integer number (7089456).

Almost surely, 2^55287293 is an apocalyptic number.

It is an amenable number.

55287293 is a deficient number, since it is larger than the sum of its proper divisors (1428355).

55287293 is a wasteful number, since it uses less digits than its factorization.

55287293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283.

The product of its digits is 151200, while the sum is 41.

The square root of 55287293 is about 7435.5425491352. The cubic root of 55287293 is about 380.9562550382.

It can be divided in two parts, 5528 and 7293, that added together give a palindrome (12821).

The spelling of 55287293 in words is "fifty-five million, two hundred eighty-seven thousand, two hundred ninety-three".