56555430 has 64 divisors (see below), whose sum is σ = 144773568. Its totient is φ = 14090240.

The previous prime is 56555417. The next prime is 56555431. The reversal of 56555430 is 3455565.

It is a junction number, because it is equal to n+sod(n) for n = 56555391 and 56555400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56555431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87910 + ... + 88550.

It is an arithmetic number, because the mean of its divisors is an integer number (2262087).

Almost surely, 2^56555430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56555430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72386784).

56555430 is an abundant number, since it is smaller than the sum of its proper divisors (88218138).

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

56555430 is a wasteful number, since it uses less digits than its factorization.

56555430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841.

The product of its (nonzero) digits is 45000, while the sum is 33.

The square root of 56555430 is about 7520.3344340528. The cubic root of 56555430 is about 383.8469577852.

The spelling of 56555430 in words is "fifty-six million, five hundred fifty-five thousand, four hundred thirty".