51534505 has 24 divisors (see below), whose sum is σ = 68717376. Its totient is φ = 37070880.

The previous prime is 51534503. The next prime is 51534523. The reversal of 51534505 is 50543515.

It is not a de Polignac number, because 51534505 - 2¹ = 51534503 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51534503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61902 + ... + 62728.

It is an arithmetic number, because the mean of its divisors is an integer number (2863224).

Almost surely, 2^51534505 is an apocalyptic number.

51534505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51534505 is a deficient number, since it is larger than the sum of its proper divisors (17182871).

51534505 is a wasteful number, since it uses less digits than its factorization.

51534505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 51534505 is about 7178.7537219214. The cubic root of 51534505 is about 372.1340158640.

The spelling of 51534505 in words is "fifty-one million, five hundred thirty-four thousand, five hundred five".