51517020 has 48 divisors (see below), whose sum is σ = 144563328. Its totient is φ = 13707840.

The previous prime is 51517019. The next prime is 51517031. The reversal of 51517020 is 2071515.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 46675 + ... + 47765.

It is an arithmetic number, because the mean of its divisors is an integer number (3011736).

Almost surely, 2^51517020 is an apocalyptic number.

It is an amenable number.

51517020 is an abundant number, since it is smaller than the sum of its proper divisors (93046308).

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

51517020 is a wasteful number, since it uses less digits than its factorization.

51517020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890 (or 1888 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 51517020 is about 7177.5357888345. The cubic root of 51517020 is about 372.0919243288.

Adding to 51517020 its reverse (2071515), we get a palindrome (53588535).

The spelling of 51517020 in words is "fifty-one million, five hundred seventeen thousand, twenty".