542397911931 has 8 divisors (see below), whose sum is σ = 803552462160. Its totient is φ = 361598607936.

The previous prime is 542397911903. The next prime is 542397911971. The reversal of 542397911931 is 139119793245.

542397911931 is a `hidden beast` number, since 5 + 423 + 9 + 79 + 119 + 31 = 666.

It is not a de Polignac number, because 542397911931 - 2²⁶ = 542330803067 is a prime.

It is a super-2 number, since 2×542397911931² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (542397911971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10044405750 + ... + 10044405803.

It is an arithmetic number, because the mean of its divisors is an integer number (100444057770).

Almost surely, 2^542397911931 is an apocalyptic number.

542397911931 is a deficient number, since it is larger than the sum of its proper divisors (261154550229).

542397911931 is a wasteful number, since it uses less digits than its factorization.

542397911931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20088811562 (or 20088811556 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The spelling of 542397911931 in words is "five hundred forty-two billion, three hundred ninety-seven million, nine hundred eleven thousand, nine hundred thirty-one".