55011020 has 48 divisors (see below), whose sum is σ = 119346528. Its totient is φ = 21288960.

The previous prime is 55011017. The next prime is 55011029. The reversal of 55011020 is 2011055.

55011020 = T₃₅₅ + T₃₅₆ + ... + T₇₂₀.

It is a junction number, because it is equal to n+sod(n) for n = 55010986 and 55011004.

It is not an unprimeable number, because it can be changed into a prime (55011029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81404 + ... + 82076.

It is an arithmetic number, because the mean of its divisors is an integer number (2486386).

Almost surely, 2^55011020 is an apocalyptic number.

It is an amenable number.

55011020 is an abundant number, since it is smaller than the sum of its proper divisors (64335508).

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

55011020 is a wasteful number, since it uses less digits than its factorization.

55011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 808 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 55011020 is about 7416.9414181319. The cubic root of 55011020 is about 380.3206434928.

Adding to 55011020 its reverse (2011055), we get a palindrome (57022075).

The spelling of 55011020 in words is "fifty-five million, eleven thousand, twenty".