51030500 has 24 divisors (see below), whose sum is σ = 111451704. Its totient is φ = 20412000.

The previous prime is 51030449. The next prime is 51030509. The reversal of 51030500 is 503015.

It can be written as a sum of positive squares in 4 ways, for example, as 2477476 + 48553024 = 1574^2 + 6968^2 .

It is a super-2 number, since 2×51030500² = 5208223860500000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51030509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50531 + ... + 51530.

It is an arithmetic number, because the mean of its divisors is an integer number (4643821).

Almost surely, 2^51030500 is an apocalyptic number.

51030500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51030500 is an abundant number, since it is smaller than the sum of its proper divisors (60421204).

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

51030500 is a wasteful number, since it uses less digits than its factorization.

51030500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102080 (or 102068 counting only the distinct ones).

The product of its (nonzero) digits is 75, while the sum is 14.

The square root of 51030500 is about 7143.5635364991. The cubic root of 51030500 is about 370.9168884089.

Adding to 51030500 its reverse (503015), we get a palindrome (51533515).

The spelling of 51030500 in words is "fifty-one million, thirty thousand, five hundred".