5142343781 has 4 divisors (see below), whose sum is σ = 5179339200. Its totient is φ = 5105348364.

The previous prime is 5142343777. The next prime is 5142343799. The reversal of 5142343781 is 1873432415.

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 an emirpimes, since its reverse is a distinct semiprime: 1873432415 = 5 ⋅374686483.

It is a cyclic number.

It is not a de Polignac number, because 5142343781 - 2² = 5142343777 is a prime.

It is a super-2 number, since 2×5142343781² = 52887399123978751922, which 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 (5142343751) 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, 18497501 + ... + 18497778.

It is an arithmetic number, because the mean of its divisors is an integer number (1294834800).

Almost surely, 2^5142343781 is an apocalyptic number.

It is an amenable number.

5142343781 is a deficient number, since it is larger than the sum of its proper divisors (36995419).

5142343781 is a wasteful number, since it uses less digits than its factorization.

5142343781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36995418.

The product of its digits is 80640, while the sum is 38.

The square root of 5142343781 is about 71710.1372261970. The cubic root of 5142343781 is about 1726.0513124837.

The spelling of 5142343781 in words is "five billion, one hundred forty-two million, three hundred forty-three thousand, seven hundred eighty-one".