55425330 has 64 divisors (see below), whose sum is σ = 149310720. Its totient is φ = 14629248.

The previous prime is 55425329. The next prime is 55425343. The reversal of 55425330 is 3352455.

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 = 55425294 and 55425303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26814 + ... + 28806.

It is an arithmetic number, because the mean of its divisors is an integer number (2332980).

Almost surely, 2^55425330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55425330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74655360).

55425330 is an abundant number, since it is smaller than the sum of its proper divisors (93885390).

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

55425330 is a wasteful number, since it uses less digits than its factorization.

55425330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112 (or 2106 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The square root of 55425330 is about 7444.8190038442. The cubic root of 55425330 is about 381.2730388299.

Adding to 55425330 its reverse (3352455), we get a palindrome (58777785).

It can be divided in two parts, 55425 and 330, that added together give a palindrome (55755).

The spelling of 55425330 in words is "fifty-five million, four hundred twenty-five thousand, three hundred thirty".