55430000 has 100 divisors (see below), whose sum is σ = 140617488. Its totient is φ = 21120000.

The previous prime is 55429999. The next prime is 55430009. The reversal of 55430000 is 3455.

It is a tau number, because it is divible by the number of its divisors (100).

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55430009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 229880 + ... + 230120.

Almost surely, 2^55430000 is an apocalyptic number.

55430000 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 55430000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70308744).

55430000 is an abundant number, since it is smaller than the sum of its proper divisors (85187488).

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

55430000 is a wasteful number, since it uses less digits than its factorization.

55430000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 55430000 is about 7445.1326381737. The cubic root of 55430000 is about 381.2837469008.

Adding to 55430000 its reverse (3455), we get a palindrome (55433455).

The spelling of 55430000 in words is "fifty-five million, four hundred thirty thousand".