542005220 has 24 divisors (see below), whose sum is σ = 1205165304. Its totient is φ = 204048896.

The previous prime is 542005201. The next prime is 542005241. The reversal of 542005220 is 22500245.

It can be written as a sum of positive squares in 4 ways, for example, as 36385024 + 505620196 = 6032^2 + 22486^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 542005192 and 542005201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 796727 + ... + 797406.

It is an arithmetic number, because the mean of its divisors is an integer number (50215221).

Almost surely, 2^542005220 is an apocalyptic number.

It is an amenable number.

542005220 is an abundant number, since it is smaller than the sum of its proper divisors (663160084).

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

542005220 is a wasteful number, since it uses less digits than its factorization.

542005220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1594159 (or 1594157 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 542005220 is about 23281.0055624752. The cubic root of 542005220 is about 815.3320036934.

Adding to 542005220 its reverse (22500245), we get a palindrome (564505465).

The spelling of 542005220 in words is "five hundred forty-two million, five thousand, two hundred twenty".