542555540 has 12 divisors (see below), whose sum is σ = 1139366676. Its totient is φ = 217022208.

The previous prime is 542555539. The next prime is 542555543. The reversal of 542555540 is 45555245.

It can be written as a sum of positive squares in 2 ways, for example, as 122633476 + 419922064 = 11074^2 + 20492^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 542555540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542555543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13563869 + ... + 13563908.

It is an arithmetic number, because the mean of its divisors is an integer number (94947223).

Almost surely, 2^542555540 is an apocalyptic number.

It is an amenable number.

542555540 is an abundant number, since it is smaller than the sum of its proper divisors (596811136).

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

542555540 is a wasteful number, since it uses less digits than its factorization.

542555540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27127786 (or 27127784 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 35.

The square root of 542555540 is about 23292.8216410121. The cubic root of 542555540 is about 815.6078569622.

It can be divided in two parts, 54255 and 5540, that added together give a palindrome (59795).

The spelling of 542555540 in words is "five hundred forty-two million, five hundred fifty-five thousand, five hundred forty".