51215040411 has 4 divisors (see below), whose sum is σ = 68286720552. Its totient is φ = 34143360272.

The previous prime is 51215040391. The next prime is 51215040431. The reversal of 51215040411 is 11404051215.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (51215040391) and next prime (51215040431).

It is a cyclic number.

It is not a de Polignac number, because 51215040411 - 2¹⁰ = 51215039387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51215040431) 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, 8535840066 + ... + 8535840071.

It is an arithmetic number, because the mean of its divisors is an integer number (17071680138).

Almost surely, 2^51215040411 is an apocalyptic number.

51215040411 is a deficient number, since it is larger than the sum of its proper divisors (17071680141).

51215040411 is a wasteful number, since it uses less digits than its factorization.

51215040411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17071680140.

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 51215040411 its reverse (11404051215), we get a palindrome (62619091626).

The spelling of 51215040411 in words is "fifty-one billion, two hundred fifteen million, forty thousand, four hundred eleven".