5078511031251 has 16 divisors (see below), whose sum is σ = 7739318340864. Its totient is φ = 2901768229344.

The previous prime is 5078511031249. The next prime is 5078511031271. The reversal of 5078511031251 is 1521301158705.

It is not a de Polignac number, because 5078511031251 - 2¹ = 5078511031249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5078511031271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9657525 + ... + 10169798.

It is an arithmetic number, because the mean of its divisors is an integer number (483707396304).

Almost surely, 2^{5078511031251} is an apocalyptic number.

5078511031251 is a deficient number, since it is larger than the sum of its proper divisors (2660807309613).

5078511031251 is a wasteful number, since it uses less digits than its factorization.

5078511031251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19839530.

The product of its (nonzero) digits is 42000, while the sum is 39.

Adding to 5078511031251 its reverse (1521301158705), we get a palindrome (6599812189956).

The spelling of 5078511031251 in words is "five trillion, seventy-eight billion, five hundred eleven million, thirty-one thousand, two hundred fifty-one".