51222023450040 has 128 divisors (see below), whose sum is σ = 154495999944000. Its totient is φ = 13585479548928.

The previous prime is 51222023449991. The next prime is 51222023450077. The reversal of 51222023450040 is 4005432022215.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73148296 + ... + 73845224.

Almost surely, 2^{51222023450040} 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 51222023450040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77247999972000).

51222023450040 is an abundant number, since it is smaller than the sum of its proper divisors (103273976493960).

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

51222023450040 is a wasteful number, since it uses less digits than its factorization.

51222023450040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700249 (or 700245 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 51222023450040 its reverse (4005432022215), we get a palindrome (55227455472255).

The spelling of 51222023450040 in words is "fifty-one trillion, two hundred twenty-two billion, twenty-three million, four hundred fifty thousand, forty".