51279602500 has 135 divisors (see below), whose sum is σ = 130648447083. Its totient is φ = 17554404000.

The previous prime is 51279602483. The next prime is 51279602509. The reversal of 51279602500 is 520697215.

The square root of 51279602500 is 226450.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 4020320836 + 47259281664 = 63406^2 + 217392^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51279602500.

It is not an unprimeable number, because it can be changed into a prime (51279602509) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 79257177 + ... + 79257823.

Almost surely, 2^51279602500 is an apocalyptic number.

51279602500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51279602500 is the 226450-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51279602500

51279602500 is an abundant number, since it is smaller than the sum of its proper divisors (79368844583).

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

51279602500 is an frugal number, since it uses more digits than its factorization.

51279602500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 661 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 51279602500 in words is "fifty-one billion, two hundred seventy-nine million, six hundred two thousand, five hundred".