55539278 has 8 divisors (see below), whose sum is σ = 83667168. Its totient is φ = 27650224.

The previous prime is 55539269. The next prime is 55539301. The reversal of 55539278 is 87293555.

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

It is a super-2 number, since 2×55539278² = 6169222801522568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59126 + ... + 60057.

It is an arithmetic number, because the mean of its divisors is an integer number (10458396).

Almost surely, 2^55539278 is an apocalyptic number.

55539278 is a deficient number, since it is larger than the sum of its proper divisors (28127890).

55539278 is a wasteful number, since it uses less digits than its factorization.

55539278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119418.

The product of its digits is 378000, while the sum is 44.

The square root of 55539278 is about 7452.4679133828. The cubic root of 55539278 is about 381.5341442449.

The spelling of 55539278 in words is "fifty-five million, five hundred thirty-nine thousand, two hundred seventy-eight".