55400115 has 24 divisors (see below), whose sum is σ = 90253008. Its totient is φ = 29018560.

The previous prime is 55400099. The next prime is 55400117. The reversal of 55400115 is 51100455.

It is not a de Polignac number, because 55400115 - 2⁴ = 55400099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55400091 and 55400100.

It is not an unprimeable number, because it can be changed into a prime (55400117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51685 + ... + 52745.

It is an arithmetic number, because the mean of its divisors is an integer number (3760542).

Almost surely, 2^55400115 is an apocalyptic number.

55400115 is a deficient number, since it is larger than the sum of its proper divisors (34852893).

55400115 is a wasteful number, since it uses less digits than its factorization.

55400115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 55400115 is about 7443.1253516248. The cubic root of 55400115 is about 381.2152117321.

The spelling of 55400115 in words is "fifty-five million, four hundred thousand, one hundred fifteen".