51265522000 has 480 divisors, whose sum is σ = 158934327552. Its totient is φ = 15649920000.

The previous prime is 51265521991. The next prime is 51265522001. The reversal of 51265522000 is 22556215.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 51265522000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51265522001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 89781715 + ... + 89782285.

Almost surely, 2^51265522000 is an apocalyptic number.

51265522000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51265522000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79467163776).

51265522000 is an abundant number, since it is smaller than the sum of its proper divisors (107668805552).

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

51265522000 is a wasteful number, since it uses less digits than its factorization.

51265522000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 649 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 51265522000 in words is "fifty-one billion, two hundred sixty-five million, five hundred twenty-two thousand".