51436505 has 16 divisors (see below), whose sum is σ = 63141120. Its totient is φ = 40215552.

The previous prime is 51436493. The next prime is 51436507. The reversal of 51436505 is 50563415.

It is a cyclic number.

It is not a de Polignac number, because 51436505 - 2²⁰ = 50387929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51436507) 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, 41657 + ... + 42873.

It is an arithmetic number, because the mean of its divisors is an integer number (3946320).

Almost surely, 2^51436505 is an apocalyptic number.

It is an amenable number.

51436505 is a deficient number, since it is larger than the sum of its proper divisors (11704615).

51436505 is a wasteful number, since it uses less digits than its factorization.

51436505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408.

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

The square root of 51436505 is about 7171.9247765157. The cubic root of 51436505 is about 371.8979780543.

The spelling of 51436505 in words is "fifty-one million, four hundred thirty-six thousand, five hundred five".