542220817818 has 32 divisors (see below), whose sum is σ = 1132687011456. Its totient is φ = 172714595328.

The previous prime is 542220817781. The next prime is 542220817819. The reversal of 542220817818 is 818718022245.

It is a super-2 number, since 2×542220817818² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (542220817819) 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, 1759255 + ... + 2044362.

It is an arithmetic number, because the mean of its divisors is an integer number (35396469108).

Almost surely, 2^542220817818 is an apocalyptic number.

542220817818 is an abundant number, since it is smaller than the sum of its proper divisors (590466193638).

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

542220817818 is a wasteful number, since it uses less digits than its factorization.

542220817818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3804678.

The product of its (nonzero) digits is 573440, while the sum is 48.

The spelling of 542220817818 in words is "five hundred forty-two billion, two hundred twenty million, eight hundred seventeen thousand, eight hundred eighteen".