51152221513 has 16 divisors (see below), whose sum is σ = 53740776960. Its totient is φ = 48594642624.

The previous prime is 51152221511. The next prime is 51152221529. The reversal of 51152221513 is 31512225115.

It is a happy number.

It is not a de Polignac number, because 51152221513 - 2¹ = 51152221511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51152221511) 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, 4127995 + ... + 4140367.

It is an arithmetic number, because the mean of its divisors is an integer number (3358798560).

Almost surely, 2^51152221513 is an apocalyptic number.

It is an amenable number.

51152221513 is a deficient number, since it is larger than the sum of its proper divisors (2588555447).

51152221513 is a wasteful number, since it uses less digits than its factorization.

51152221513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13608.

The product of its digits is 3000, while the sum is 28.

Adding to 51152221513 its reverse (31512225115), we get a palindrome (82664446628).

The spelling of 51152221513 in words is "fifty-one billion, one hundred fifty-two million, two hundred twenty-one thousand, five hundred thirteen".