55433430 has 128 divisors (see below), whose sum is σ = 168739200. Its totient is φ = 12828672.

The previous prime is 55433429. The next prime is 55433453. The reversal of 55433430 is 3433455.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 55433394 and 55433403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 59206 + ... + 60134.

It is an arithmetic number, because the mean of its divisors is an integer number (1318275).

Almost surely, 2^55433430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55433430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84369600).

55433430 is an abundant number, since it is smaller than the sum of its proper divisors (113305770).

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

55433430 is a wasteful number, since it uses less digits than its factorization.

55433430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 27.

The square root of 55433430 is about 7445.3629864500. The cubic root of 55433430 is about 381.2916113321.

Adding to 55433430 its reverse (3433455), we get a palindrome (58866885).

The spelling of 55433430 in words is "fifty-five million, four hundred thirty-three thousand, four hundred thirty".