51213135311 has 8 divisors (see below), whose sum is σ = 57550547040. Its totient is φ = 45218286432.

The previous prime is 51213135283. The next prime is 51213135419. The reversal of 51213135311 is 11353131215.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51213135311 - 2¹⁴ = 51213118927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51213131311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85640396 + ... + 85640993.

It is an arithmetic number, because the mean of its divisors is an integer number (7193818380).

Almost surely, 2^51213135311 is an apocalyptic number.

51213135311 is a deficient number, since it is larger than the sum of its proper divisors (6337411729).

51213135311 is a wasteful number, since it uses less digits than its factorization.

51213135311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171281425.

The product of its digits is 1350, while the sum is 26.

Adding to 51213135311 its reverse (11353131215), we get a palindrome (62566266526).

The spelling of 51213135311 in words is "fifty-one billion, two hundred thirteen million, one hundred thirty-five thousand, three hundred eleven".