51230000 has 100 divisors (see below), whose sum is σ = 127834080. Its totient is φ = 19872000.

The previous prime is 51229987. The next prime is 51230021. The reversal of 51230000 is 3215.

It is a tau number, because it is divible by the number of its divisors (100).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 469946 + ... + 470054.

Almost surely, 2^51230000 is an apocalyptic number.

51230000 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 51230000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63917040).

51230000 is an abundant number, since it is smaller than the sum of its proper divisors (76604080).

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

51230000 is a wasteful number, since it uses less digits than its factorization.

51230000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 11.

The square root of 51230000 is about 7157.5135347410. The cubic root of 51230000 is about 371.3996173542.

Adding to 51230000 its reverse (3215), we get a palindrome (51233215).

The spelling of 51230000 in words is "fifty-one million, two hundred thirty thousand".