51543501400 has 96 divisors (see below), whose sum is σ = 125818018560. Its totient is φ = 19599719040.

The previous prime is 51543501389. The next prime is 51543501419. The reversal of 51543501400 is 410534515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 715429 + ... + 784171.

It is an arithmetic number, because the mean of its divisors is an integer number (1310604360).

Almost surely, 2^51543501400 is an apocalyptic number.

51543501400 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 51543501400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62909009280).

51543501400 is an abundant number, since it is smaller than the sum of its proper divisors (74274517160).

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

51543501400 is a wasteful number, since it uses less digits than its factorization.

51543501400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68945 (or 68936 counting only the distinct ones).

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

The spelling of 51543501400 in words is "fifty-one billion, five hundred forty-three million, five hundred one thousand, four hundred".