51616124213 has 4 divisors (see below), whose sum is σ = 51806589888. Its totient is φ = 51425658540.

The previous prime is 51616124143. The next prime is 51616124221. The reversal of 51616124213 is 31242161615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51616124213 - 2¹² = 51616120117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51616124213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51616121213) 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, 95232431 + ... + 95232972.

It is an arithmetic number, because the mean of its divisors is an integer number (12951647472).

Almost surely, 2^51616124213 is an apocalyptic number.

It is an amenable number.

51616124213 is a deficient number, since it is larger than the sum of its proper divisors (190465675).

51616124213 is a wasteful number, since it uses less digits than its factorization.

51616124213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190465674.

The product of its digits is 8640, while the sum is 32.

Adding to 51616124213 its reverse (31242161615), we get a palindrome (82858285828).

The spelling of 51616124213 in words is "fifty-one billion, six hundred sixteen million, one hundred twenty-four thousand, two hundred thirteen".