542393281 has 4 divisors (see below), whose sum is σ = 542455600. Its totient is φ = 542330964.

The previous prime is 542393261. The next prime is 542393287. The reversal of 542393281 is 182393245.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 542393281 - 2²⁷ = 408175553 is a prime.

It is a super-2 number, since 2×542393281² = 588380942547889922, which contains 22 as substring.

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 542393281.

It is not an unprimeable number, because it can be changed into a prime (542393287) 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, 15471 + ... + 36388.

It is an arithmetic number, because the mean of its divisors is an integer number (135613900).

Almost surely, 2^542393281 is an apocalyptic number.

It is an amenable number.

542393281 is a deficient number, since it is larger than the sum of its proper divisors (62319).

542393281 is a wasteful number, since it uses less digits than its factorization.

542393281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62318.

The product of its digits is 51840, while the sum is 37.

The square root of 542393281 is about 23289.3383547064. The cubic root of 542393281 is about 815.5265424543.

The spelling of 542393281 in words is "five hundred forty-two million, three hundred ninety-three thousand, two hundred eighty-one".