51162162331 has 4 divisors (see below), whose sum is σ = 58471042672. Its totient is φ = 43853281992.

The previous prime is 51162162313. The next prime is 51162162341. The reversal of 51162162331 is 13326126115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13326126115 = 5 ⋅2665225223.

It is a cyclic number.

It is not a de Polignac number, because 51162162331 - 2⁹ = 51162161819 is a prime.

It is a super-2 number, since 2×51162162331² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51162162293 and 51162162302.

It is not an unprimeable number, because it can be changed into a prime (51162162341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3654440160 + ... + 3654440173.

It is an arithmetic number, because the mean of its divisors is an integer number (14617760668).

Almost surely, 2^51162162331 is an apocalyptic number.

51162162331 is a deficient number, since it is larger than the sum of its proper divisors (7308880341).

51162162331 is an equidigital number, since it uses as much as digits as its factorization.

51162162331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7308880340.

The product of its digits is 6480, while the sum is 31.

Adding to 51162162331 its reverse (13326126115), we get a palindrome (64488288446).

The spelling of 51162162331 in words is "fifty-one billion, one hundred sixty-two million, one hundred sixty-two thousand, three hundred thirty-one".