51001212163 has 4 divisors (see below), whose sum is σ = 55637686008. Its totient is φ = 46364738320.

The previous prime is 51001212149. The next prime is 51001212173. The reversal of 51001212163 is 36121210015.

It is a happy number.

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 51001212163 - 2²⁹ = 50464341251 is a prime.

It is a super-2 number, since 2×51001212163² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51001212133) 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, 2318236906 + ... + 2318236927.

It is an arithmetic number, because the mean of its divisors is an integer number (13909421502).

Almost surely, 2^51001212163 is an apocalyptic number.

51001212163 is a deficient number, since it is larger than the sum of its proper divisors (4636473845).

51001212163 is a wasteful number, since it uses less digits than its factorization.

51001212163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4636473844.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 51001212163 its reverse (36121210015), we get a palindrome (87122422178).

The spelling of 51001212163 in words is "fifty-one billion, one million, two hundred twelve thousand, one hundred sixty-three".