51061700 has 18 divisors (see below), whose sum is σ = 110804106. Its totient is φ = 20424640.

The previous prime is 51061691. The next prime is 51061711. The reversal of 51061700 is 716015.

It can be written as a sum of positive squares in 3 ways, for example, as 24964 + 51036736 = 158^2 + 7144^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 255209 + ... + 255408.

Almost surely, 2^51061700 is an apocalyptic number.

51061700 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51061700 is an abundant number, since it is smaller than the sum of its proper divisors (59742406).

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

51061700 is a wasteful number, since it uses less digits than its factorization.

51061700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510631 (or 510624 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 20.

The square root of 51061700 is about 7145.7469868447. The cubic root of 51061700 is about 370.9924657547.

Adding to 51061700 its reverse (716015), we get a palindrome (51777715).

The spelling of 51061700 in words is "fifty-one million, sixty-one thousand, seven hundred".