51536405 has 16 divisors (see below), whose sum is σ = 63296640. Its totient is φ = 40267968.

The previous prime is 51536383. The next prime is 51536413. The reversal of 51536405 is 50463515.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51536405 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, 116114 + ... + 116556.

It is an arithmetic number, because the mean of its divisors is an integer number (3956040).

Almost surely, 2^51536405 is an apocalyptic number.

It is an amenable number.

51536405 is a deficient number, since it is larger than the sum of its proper divisors (11760235).

51536405 is a wasteful number, since it uses less digits than its factorization.

51536405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 51536405 is about 7178.8860556496. The cubic root of 51536405 is about 372.1385891490.

The spelling of 51536405 in words is "fifty-one million, five hundred thirty-six thousand, four hundred five".