542521111 has 16 divisors (see below), whose sum is σ = 612799488. Its totient is φ = 475833600.

The previous prime is 542521103. The next prime is 542521169. The reversal of 542521111 is 111125245.

It is not a de Polignac number, because 542521111 - 2³ = 542521103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542525111) 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, 118120 + ... + 122626.

It is an arithmetic number, because the mean of its divisors is an integer number (38299968).

Almost surely, 2^542521111 is an apocalyptic number.

542521111 is a deficient number, since it is larger than the sum of its proper divisors (70278377).

542521111 is a wasteful number, since it uses less digits than its factorization.

542521111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4902.

The product of its digits is 400, while the sum is 22.

The square root of 542521111 is about 23292.0825818560. The cubic root of 542521111 is about 815.5906045614.

Adding to 542521111 its reverse (111125245), we get a palindrome (653646356).

The spelling of 542521111 in words is "five hundred forty-two million, five hundred twenty-one thousand, one hundred eleven".