51243107000 has 64 divisors (see below), whose sum is σ = 120406983840. Its totient is φ = 20412096000.

The previous prime is 51243106939. The next prime is 51243107017. The reversal of 51243107000 is 70134215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134687 + ... + 347313.

Almost surely, 2^51243107000 is an apocalyptic number.

51243107000 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 51243107000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60203491920).

51243107000 is an abundant number, since it is smaller than the sum of its proper divisors (69163876840).

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

51243107000 is a wasteful number, since it uses less digits than its factorization.

51243107000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212889 (or 212875 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The spelling of 51243107000 in words is "fifty-one billion, two hundred forty-three million, one hundred seven thousand".