55278349 has 16 divisors (see below), whose sum is σ = 65308672. Its totient is φ = 45804528.

The previous prime is 55278343. The next prime is 55278371. The reversal of 55278349 is 94387255.

It is not a de Polignac number, because 55278349 - 2³ = 55278341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55278341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30112 + ... + 31894.

It is an arithmetic number, because the mean of its divisors is an integer number (4081792).

Almost surely, 2^55278349 is an apocalyptic number.

It is an amenable number.

55278349 is a deficient number, since it is larger than the sum of its proper divisors (10030323).

55278349 is a wasteful number, since it uses less digits than its factorization.

55278349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1936.

The product of its digits is 302400, while the sum is 43.

The square root of 55278349 is about 7434.9410892084. The cubic root of 55278349 is about 380.9357110982.

The spelling of 55278349 in words is "fifty-five million, two hundred seventy-eight thousand, three hundred forty-nine".