51203041620 has 96 divisors (see below), whose sum is σ = 148646486016. Its totient is φ = 13155369600.

The previous prime is 51203041609. The next prime is 51203041621. The reversal of 51203041620 is 2614030215.

It is a super-2 number, since 2×51203041620² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51203041621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361585 + ... + 482855.

It is an arithmetic number, because the mean of its divisors is an integer number (1548400896).

Almost surely, 2^51203041620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51203041620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74323243008).

51203041620 is an abundant number, since it is smaller than the sum of its proper divisors (97443444396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51203041620 is a wasteful number, since it uses less digits than its factorization.

51203041620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121541 (or 121539 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 51203041620 its reverse (2614030215), we get a palindrome (53817071835).

The spelling of 51203041620 in words is "fifty-one billion, two hundred three million, forty-one thousand, six hundred twenty".