55155450 has 48 divisors (see below), whose sum is σ = 156329280. Its totient is φ = 12606720.

The previous prime is 55155439. The next prime is 55155473. The reversal of 55155450 is 5455155.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25215 + ... + 27314.

It is an arithmetic number, because the mean of its divisors is an integer number (3256860).

Almost surely, 2^55155450 is an apocalyptic number.

55155450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55155450 is an abundant number, since it is smaller than the sum of its proper divisors (101173830).

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

55155450 is a wasteful number, since it uses less digits than its factorization.

55155450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52551 (or 52546 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 55155450 is about 7426.6715290229. The cubic root of 55155450 is about 380.6531932762.

The spelling of 55155450 in words is "fifty-five million, one hundred fifty-five thousand, four hundred fifty".