51302540000 has 120 divisors (see below), whose sum is σ = 126820535688. Its totient is φ = 20422080000.

The previous prime is 51302539997. The next prime is 51302540017. The reversal of 51302540000 is 4520315.

It is a super-2 number, since 2×51302540000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4213922 + ... + 4226078.

Almost surely, 2^51302540000 is an apocalyptic number.

51302540000 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 51302540000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63410267844).

51302540000 is an abundant number, since it is smaller than the sum of its proper divisors (75517995688).

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

51302540000 is a wasteful number, since it uses less digits than its factorization.

51302540000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12398 (or 12375 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The spelling of 51302540000 in words is "fifty-one billion, three hundred two million, five hundred forty thousand".