542323561 has 8 divisors (see below), whose sum is σ = 584958080. Its totient is φ = 499820112.

The previous prime is 542323513. The next prime is 542323567. The reversal of 542323561 is 165323245.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 542323561 - 2⁷ = 542323433 is a prime.

It is a super-2 number, since 2×542323561² = 588229689631441442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542323567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24081 + ... + 40798.

It is an arithmetic number, because the mean of its divisors is an integer number (73119760).

Almost surely, 2^542323561 is an apocalyptic number.

It is an amenable number.

542323561 is a deficient number, since it is larger than the sum of its proper divisors (42634519).

542323561 is a wasteful number, since it uses less digits than its factorization.

542323561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65535.

The product of its digits is 21600, while the sum is 31.

The square root of 542323561 is about 23287.8414843454. The cubic root of 542323561 is about 815.4915979784.

The spelling of 542323561 in words is "five hundred forty-two million, three hundred twenty-three thousand, five hundred sixty-one".