51606801 has 20 divisors (see below), whose sum is σ = 77409024. Its totient is φ = 34263000.

The previous prime is 51606791. The next prime is 51606803. The reversal of 51606801 is 10860615.

51606801 is a `hidden beast` number, since 51 + 606 + 8 + 0 + 1 = 666.

It is not a de Polignac number, because 51606801 - 2¹¹ = 51604753 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51606803) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20776 + ... + 23126.

Almost surely, 2^51606801 is an apocalyptic number.

It is an amenable number.

51606801 is a deficient number, since it is larger than the sum of its proper divisors (25802223).

51606801 is a wasteful number, since it uses less digits than its factorization.

51606801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634 (or 2625 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 51606801 is about 7183.7873715750. The cubic root of 51606801 is about 372.3079525936.

The spelling of 51606801 in words is "fifty-one million, six hundred six thousand, eight hundred one".