51536505 has 8 divisors (see below), whose sum is σ = 82458432. Its totient is φ = 27486128.

The previous prime is 51536483. The next prime is 51536533. The reversal of 51536505 is 50563515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51536505 - 2⁷ = 51536377 is a prime.

It is a super-2 number, since 2×51536505² = 5312022695230050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1717869 + ... + 1717898.

It is an arithmetic number, because the mean of its divisors is an integer number (10307304).

Almost surely, 2^51536505 is an apocalyptic number.

It is an amenable number.

51536505 is a deficient number, since it is larger than the sum of its proper divisors (30921927).

51536505 is a wasteful number, since it uses less digits than its factorization.

51536505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3435775.

The product of its (nonzero) digits is 11250, while the sum is 30.

The square root of 51536505 is about 7178.8930205151. The cubic root of 51536505 is about 372.1388298451.

It can be divided in two parts, 5153650 and 5, that added together give a triangular number (5153655 = T₃₂₁₀).

The spelling of 51536505 in words is "fifty-one million, five hundred thirty-six thousand, five hundred five".