51520501 has 6 divisors (see below), whose sum is σ = 53359202. Its totient is φ = 49743120.

The previous prime is 51520499. The next prime is 51520583. The reversal of 51520501 is 10502515.

51520501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 3204100 + 48316401 = 1790^2 + 6951^2 .

It is not a de Polignac number, because 51520501 - 2¹ = 51520499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51520801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29790 + ... + 31471.

Almost surely, 2^51520501 is an apocalyptic number.

It is an amenable number.

51520501 is a deficient number, since it is larger than the sum of its proper divisors (1838701).

51520501 is an equidigital number, since it uses as much as digits as its factorization.

51520501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61319 (or 61290 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 51520501 is about 7177.7782774338. The cubic root of 51520501 is about 372.1003048783.

The spelling of 51520501 in words is "fifty-one million, five hundred twenty thousand, five hundred one".