542097083981 has 4 divisors (see below), whose sum is σ = 542172813600. Its totient is φ = 542021354364.

The previous prime is 542097083963. The next prime is 542097083989. The reversal of 542097083981 is 189380790245.

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 542097083981 - 2³⁰ = 541023342157 is a prime.

It is a super-2 number, since 2×542097083981² (a number of 24 digits) 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 (542097083989) 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, 37854071 + ... + 37868388.

It is an arithmetic number, because the mean of its divisors is an integer number (135543203400).

Almost surely, 2^542097083981 is an apocalyptic number.

It is an amenable number.

542097083981 is a deficient number, since it is larger than the sum of its proper divisors (75729619).

542097083981 is an equidigital number, since it uses as much as digits as its factorization.

542097083981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75729618.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 542097083981 in words is "five hundred forty-two billion, ninety-seven million, eighty-three thousand, nine hundred eighty-one".