55278537 has 8 divisors (see below), whose sum is σ = 75502560. Its totient is φ = 35953440.

The previous prime is 55278529. The next prime is 55278547. The reversal of 55278537 is 73587255.

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

It is not a de Polignac number, because 55278537 - 2³ = 55278529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55278547) 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, 224587 + ... + 224832.

It is an arithmetic number, because the mean of its divisors is an integer number (9437820).

Almost surely, 2^55278537 is an apocalyptic number.

It is an amenable number.

55278537 is a deficient number, since it is larger than the sum of its proper divisors (20224023).

55278537 is a wasteful number, since it uses less digits than its factorization.

55278537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449463.

The product of its digits is 294000, while the sum is 42.

The square root of 55278537 is about 7434.9537322030. The cubic root of 55278537 is about 380.9361429480.

The spelling of 55278537 in words is "fifty-five million, two hundred seventy-eight thousand, five hundred thirty-seven".