55378258 has 12 divisors (see below), whose sum is σ = 89949258. Its totient is φ = 25559040.

The previous prime is 55378237. The next prime is 55378283. The reversal of 55378258 is 85287355.

It can be written as a sum of positive squares in 3 ways, for example, as 44796249 + 10582009 = 6693^2 + 3253^2 .

It is a super-2 number, since 2×55378258² = 6133502918229128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81583 + ... + 82258.

Almost surely, 2^55378258 is an apocalyptic number.

55378258 is a deficient number, since it is larger than the sum of its proper divisors (34571000).

55378258 is a wasteful number, since it uses less digits than its factorization.

55378258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163869 (or 163856 counting only the distinct ones).

The product of its digits is 336000, while the sum is 43.

The square root of 55378258 is about 7441.6569391500. The cubic root of 55378258 is about 381.1650715420.

The spelling of 55378258 in words is "fifty-five million, three hundred seventy-eight thousand, two hundred fifty-eight".