542550139 has 4 divisors (see below), whose sum is σ = 543103056. Its totient is φ = 541997224.

The previous prime is 542550137. The next prime is 542550161. The reversal of 542550139 is 931055245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931055245 = 5 ⋅186211049.

It is a cyclic number.

It is not a de Polignac number, because 542550139 - 2¹ = 542550137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542550133) 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, 274984 + ... + 276949.

It is an arithmetic number, because the mean of its divisors is an integer number (135775764).

Almost surely, 2^542550139 is an apocalyptic number.

542550139 is a deficient number, since it is larger than the sum of its proper divisors (552917).

542550139 is an equidigital number, since it uses as much as digits as its factorization.

542550139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552916.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 542550139 is about 23292.7057037176. The cubic root of 542550139 is about 815.6051505648.

The spelling of 542550139 in words is "five hundred forty-two million, five hundred fifty thousand, one hundred thirty-nine".