55380258 has 24 divisors (see below), whose sum is σ = 122918796. Its totient is φ = 18009600.

The previous prime is 55380233. The next prime is 55380287. The reversal of 55380258 is 85208355.

55380258 is a `hidden beast` number, since 553 + 80 + 25 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 55308969 + 71289 = 7437^2 + 267^2 .

It is a super-2 number, since 2×55380258² = 6133945952293128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36783 + ... + 38258.

Almost surely, 2^55380258 is an apocalyptic number.

55380258 is an abundant number, since it is smaller than the sum of its proper divisors (67538538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55380258 is a wasteful number, since it uses less digits than its factorization.

55380258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75090 (or 75087 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 55380258 is about 7441.7913166119. The cubic root of 55380258 is about 381.1696601116.

The spelling of 55380258 in words is "fifty-five million, three hundred eighty thousand, two hundred fifty-eight".