51213006570 has 192 divisors, whose sum is σ = 139523586048. Its totient is φ = 11930486400.

The previous prime is 51213006569. The next prime is 51213006623. The reversal of 51213006570 is 7560031215.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 52960227 + ... + 52961193.

It is an arithmetic number, because the mean of its divisors is an integer number (726685344).

Almost surely, 2^51213006570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51213006570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69761793024).

51213006570 is an abundant number, since it is smaller than the sum of its proper divisors (88310579478).

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

51213006570 is a wasteful number, since it uses less digits than its factorization.

51213006570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217 (or 1186 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 30.

Adding to 51213006570 its reverse (7560031215), we get a palindrome (58773037785).

The spelling of 51213006570 in words is "fifty-one billion, two hundred thirteen million, six thousand, five hundred seventy".