542047031 has 4 divisors (see below), whose sum is σ = 542117712. Its totient is φ = 541976352.

The previous prime is 542047001. The next prime is 542047043. The reversal of 542047031 is 130740245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130740245 = 5 ⋅26148049.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542047031 is a prime.

It is a super-2 number, since 2×542047031² = 587629967631829922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542047001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22211 + ... + 39716.

It is an arithmetic number, because the mean of its divisors is an integer number (135529428).

Almost surely, 2^542047031 is an apocalyptic number.

542047031 is a deficient number, since it is larger than the sum of its proper divisors (70681).

542047031 is an equidigital number, since it uses as much as digits as its factorization.

542047031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70680.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 542047031 is about 23281.9035089487. The cubic root of 542047031 is about 815.3529684176.

Adding to 542047031 its reverse (130740245), we get a palindrome (672787276).

The spelling of 542047031 in words is "five hundred forty-two million, forty-seven thousand, thirty-one".