51853505 has 16 divisors (see below), whose sum is σ = 68062464. Its totient is φ = 37610880.

The previous prime is 51853499. The next prime is 51853517. The reversal of 51853505 is 50535815.

It is not a de Polignac number, because 51853505 - 2¹⁰ = 51852481 is a prime.

It is a Duffinian 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, 24104 + ... + 26166.

It is an arithmetic number, because the mean of its divisors is an integer number (4253904).

Almost surely, 2^51853505 is an apocalyptic number.

51853505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51853505 is a deficient number, since it is larger than the sum of its proper divisors (16208959).

51853505 is a wasteful number, since it uses less digits than its factorization.

51853505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 51853505 is about 7200.9377861498. The cubic root of 51853505 is about 372.9002768962.

The spelling of 51853505 in words is "fifty-one million, eight hundred fifty-three thousand, five hundred five".