51542000000 has 112 divisors (see below), whose sum is σ = 128354997660. Its totient is φ = 20616000000.

The previous prime is 51541999969. The next prime is 51542000071. The reversal of 51542000000 is 24515.

It is a super-3 number, since 3×51542000000³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 1987115 + ... + 2012885.

Almost surely, 2^51542000000 is an apocalyptic number.

51542000000 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 51542000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64177498830).

51542000000 is an abundant number, since it is smaller than the sum of its proper divisors (76812997660).

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

51542000000 is an frugal number, since it uses more digits than its factorization.

51542000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25815 (or 25778 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

Adding to 51542000000 its reverse (24515), we get a palindrome (51542024515).

The spelling of 51542000000 in words is "fifty-one billion, five hundred forty-two million", and thus it is an aban number.