55055418 has 32 divisors (see below), whose sum is σ = 127189440. Its totient is φ = 15701760.

The previous prime is 55055417. The next prime is 55055419. The reversal of 55055418 is 81455055.

It is an interprime number because it is at equal distance from previous prime (55055417) and next prime (55055419).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (55055417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23413 + ... + 25656.

It is an arithmetic number, because the mean of its divisors is an integer number (3974670).

Almost surely, 2^55055418 is an apocalyptic number.

55055418 is an abundant number, since it is smaller than the sum of its proper divisors (72134022).

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

55055418 is a wasteful number, since it uses less digits than its factorization.

55055418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49102.

The product of its (nonzero) digits is 20000, while the sum is 33.

The square root of 55055418 is about 7419.9338271982. The cubic root of 55055418 is about 380.4229316970.

The spelling of 55055418 in words is "fifty-five million, fifty-five thousand, four hundred eighteen".