51282393539 has 4 divisors (see below), whose sum is σ = 55227193056. Its totient is φ = 47337594024.

The previous prime is 51282393527. The next prime is 51282393577. The reversal of 51282393539 is 93539328215.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51282393539 - 2¹⁶ = 51282328003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51282393599) 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, 1972399739 + ... + 1972399764.

It is an arithmetic number, because the mean of its divisors is an integer number (13806798264).

Almost surely, 2^51282393539 is an apocalyptic number.

51282393539 is a deficient number, since it is larger than the sum of its proper divisors (3944799517).

51282393539 is a wasteful number, since it uses less digits than its factorization.

51282393539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944799516.

The product of its digits is 1749600, while the sum is 50.

The spelling of 51282393539 in words is "fifty-one billion, two hundred eighty-two million, three hundred ninety-three thousand, five hundred thirty-nine".