51020680 has 32 divisors (see below), whose sum is σ = 115003800. Its totient is φ = 20371456.

The previous prime is 51020677. The next prime is 51020731. The reversal of 51020680 is 8602015.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 41447844 + 9572836 = 6438^2 + 3094^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36474 + ... + 37846.

Almost surely, 2^51020680 is an apocalyptic number.

It is an amenable number.

51020680 is an abundant number, since it is smaller than the sum of its proper divisors (63983120).

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

51020680 is a wasteful number, since it uses less digits than its factorization.

51020680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313 (or 2309 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 51020680 is about 7142.8761714032. The cubic root of 51020680 is about 370.8930945503.

Adding to 51020680 its reverse (8602015), we get a palindrome (59622695).

The spelling of 51020680 in words is "fifty-one million, twenty thousand, six hundred eighty".