51520485 has 16 divisors (see below), whose sum is σ = 83191680. Its totient is φ = 27224640.

The previous prime is 51520459. The next prime is 51520499. The reversal of 51520485 is 58402515.

It is not a de Polignac number, because 51520485 - 2⁹ = 51519973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14121 + ... + 17390.

It is an arithmetic number, because the mean of its divisors is an integer number (5199480).

Almost surely, 2^51520485 is an apocalyptic number.

It is an amenable number.

51520485 is a deficient number, since it is larger than the sum of its proper divisors (31671195).

51520485 is a wasteful number, since it uses less digits than its factorization.

51520485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31628.

The product of its (nonzero) digits is 8000, while the sum is 30.

The square root of 51520485 is about 7177.7771628827. Note that the first 3 decimals coincide. The cubic root of 51520485 is about 372.1002663590.

The spelling of 51520485 in words is "fifty-one million, five hundred twenty thousand, four hundred eighty-five".