542178517 has 4 divisors (see below), whose sum is σ = 565751520. Its totient is φ = 518605516.

The previous prime is 542178491. The next prime is 542178551. The reversal of 542178517 is 715871245.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 542178517 - 2¹⁹ = 541654229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 542178517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542178557) 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, 11786467 + ... + 11786512.

It is an arithmetic number, because the mean of its divisors is an integer number (141437880).

Almost surely, 2^542178517 is an apocalyptic number.

It is an amenable number.

542178517 is a deficient number, since it is larger than the sum of its proper divisors (23573003).

542178517 is a wasteful number, since it uses less digits than its factorization.

542178517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23573002.

The product of its digits is 78400, while the sum is 40.

The square root of 542178517 is about 23284.7271188648. The cubic root of 542178517 is about 815.4188906389.

It can be divided in two parts, 5421 and 78517, that added together give a palindrome (83938).

The spelling of 542178517 in words is "five hundred forty-two million, one hundred seventy-eight thousand, five hundred seventeen".