51305535 has 16 divisors (see below), whose sum is σ = 91210080. Its totient is φ = 27362880.

The previous prime is 51305521. The next prime is 51305539. The reversal of 51305535 is 53550315.

It is not a de Polignac number, because 51305535 - 2¹⁰ = 51304511 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 51305499 and 51305508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51305539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189886 + ... + 190155.

It is an arithmetic number, because the mean of its divisors is an integer number (5700630).

Almost surely, 2^51305535 is an apocalyptic number.

51305535 is a deficient number, since it is larger than the sum of its proper divisors (39904545).

51305535 is a wasteful number, since it uses less digits than its factorization.

51305535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380055 (or 380049 counting only the distinct ones).

The product of its (nonzero) digits is 5625, while the sum is 27.

The square root of 51305535 is about 7162.7882140965. The cubic root of 51305535 is about 371.5820618441.

The spelling of 51305535 in words is "fifty-one million, three hundred five thousand, five hundred thirty-five".