51471900000 has 216 divisors, whose sum is σ = 182958008688. Its totient is φ = 13725600000.

The previous prime is 51471899993. The next prime is 51471900013. The reversal of 51471900000 is 917415.

It is a super-2 number, since 2×51471900000² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 871405 + ... + 928595.

It is an arithmetic number, because the mean of its divisors is an integer number (847027818).

Almost surely, 2^51471900000 is an apocalyptic number.

51471900000 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 51471900000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91479004344).

51471900000 is an abundant number, since it is smaller than the sum of its proper divisors (131486108688).

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

51471900000 is an equidigital number, since it uses as much as digits as its factorization.

51471900000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57232 (or 57201 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The spelling of 51471900000 in words is "fifty-one billion, four hundred seventy-one million, nine hundred thousand".