55551450 has 48 divisors (see below), whose sum is σ = 140124960. Its totient is φ = 14560320.

The previous prime is 55551449. The next prime is 55551479. The reversal of 55551450 is 5415555.

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, 5712 + ... + 11988.

It is an arithmetic number, because the mean of its divisors is an integer number (2919270).

Almost surely, 2^55551450 is an apocalyptic number.

55551450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55551450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70062480).

55551450 is an abundant number, since it is smaller than the sum of its proper divisors (84573510).

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

55551450 is a wasteful number, since it uses less digits than its factorization.

55551450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6351 (or 6346 counting only the distinct ones).

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

The square root of 55551450 is about 7453.2845108717. The cubic root of 55551450 is about 381.5620145771.

The spelling of 55551450 in words is "fifty-five million, five hundred fifty-one thousand, four hundred fifty".