55137279 has 8 divisors (see below), whose sum is σ = 76712832. Its totient is φ = 35159960.

The previous prime is 55137253. The next prime is 55137293. The reversal of 55137279 is 97273155.

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 55137279 - 2⁷ = 55137151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55137479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399477 + ... + 399614.

It is an arithmetic number, because the mean of its divisors is an integer number (9589104).

Almost surely, 2^55137279 is an apocalyptic number.

55137279 is a deficient number, since it is larger than the sum of its proper divisors (21575553).

55137279 is a wasteful number, since it uses less digits than its factorization.

55137279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799117.

The product of its digits is 66150, while the sum is 39.

The square root of 55137279 is about 7425.4480672886. The cubic root of 55137279 is about 380.6113865348.

The spelling of 55137279 in words is "fifty-five million, one hundred thirty-seven thousand, two hundred seventy-nine".