51520571 has 8 divisors (see below), whose sum is σ = 54412800. Its totient is φ = 48646440.

The previous prime is 51520499. The next prime is 51520583. The reversal of 51520571 is 17502515.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51520571 - 2²² = 47326267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51520571.

It is not an unprimeable number, because it can be changed into a prime (51526571) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1550 + ... + 10268.

It is an arithmetic number, because the mean of its divisors is an integer number (6801600).

Almost surely, 2^51520571 is an apocalyptic number.

51520571 is a deficient number, since it is larger than the sum of its proper divisors (2892229).

51520571 is a wasteful number, since it uses less digits than its factorization.

51520571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9049.

The product of its (nonzero) digits is 1750, while the sum is 26.

The square root of 51520571 is about 7177.7831535928. The cubic root of 51520571 is about 372.1004734003.

The spelling of 51520571 in words is "fifty-one million, five hundred twenty thousand, five hundred seventy-one".