55020030 has 64 divisors (see below), whose sum is σ = 144281088. Its totient is φ = 13345920.

The previous prime is 55020023. The next prime is 55020061. The reversal of 55020030 is 3002055.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55019991 and 55020009.

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, 26697 + ... + 28683.

It is an arithmetic number, because the mean of its divisors is an integer number (2254392).

Almost surely, 2^55020030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55020030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72140544).

55020030 is an abundant number, since it is smaller than the sum of its proper divisors (89261058).

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

55020030 is a wasteful number, since it uses less digits than its factorization.

55020030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081.

The product of its (nonzero) digits is 150, while the sum is 15.

The square root of 55020030 is about 7417.5487864927. The cubic root of 55020030 is about 380.3414060111.

Adding to 55020030 its reverse (3002055), we get a palindrome (58022085).

The spelling of 55020030 in words is "fifty-five million, twenty thousand, thirty".