55278253 has 4 divisors (see below), whose sum is σ = 55391328. Its totient is φ = 55165180.

The previous prime is 55278247. The next prime is 55278281. The reversal of 55278253 is 35287255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55278253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55278653) 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, 55801 + ... + 56782.

It is an arithmetic number, because the mean of its divisors is an integer number (13847832).

Almost surely, 2^55278253 is an apocalyptic number.

It is an amenable number.

55278253 is a deficient number, since it is larger than the sum of its proper divisors (113075).

55278253 is a wasteful number, since it uses less digits than its factorization.

55278253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113074.

The product of its digits is 84000, while the sum is 37.

The square root of 55278253 is about 7434.9346332029. The cubic root of 55278253 is about 380.9354905788.

The spelling of 55278253 in words is "fifty-five million, two hundred seventy-eight thousand, two hundred fifty-three".