55451000 has 96 divisors (see below), whose sum is σ = 143573040. Its totient is φ = 19880000.

The previous prime is 55450963. The next prime is 55451017. The reversal of 55451000 is 15455.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 780965 + ... + 781035.

Almost surely, 2^55451000 is an apocalyptic number.

55451000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55451000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71786520).

55451000 is an abundant number, since it is smaller than the sum of its proper divisors (88122040).

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

55451000 is a wasteful number, since it uses less digits than its factorization.

55451000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 55451000 is about 7446.5428220081. The cubic root of 55451000 is about 381.3318913937.

Adding to 55451000 its reverse (15455), we get a palindrome (55466455).

The spelling of 55451000 in words is "fifty-five million, four hundred fifty-one thousand".