542115647 has 4 divisors (see below), whose sum is σ = 560809320. Its totient is φ = 523421976.

The previous prime is 542115599. The next prime is 542115667. The reversal of 542115647 is 746511245.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 542115647 - 2²⁸ = 273680191 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 (542115667) 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, 9346793 + ... + 9346850.

It is an arithmetic number, because the mean of its divisors is an integer number (140202330).

Almost surely, 2^542115647 is an apocalyptic number.

542115647 is a deficient number, since it is larger than the sum of its proper divisors (18693673).

542115647 is a wasteful number, since it uses less digits than its factorization.

542115647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18693672.

The product of its digits is 33600, while the sum is 35.

The square root of 542115647 is about 23283.3770531682. The cubic root of 542115647 is about 815.3873712742.

The spelling of 542115647 in words is "five hundred forty-two million, one hundred fifteen thousand, six hundred forty-seven".