51606001 has 4 divisors (see below), whose sum is σ = 51952500. Its totient is φ = 51259504.

The previous prime is 51605989. The next prime is 51606007. The reversal of 51606001 is 10060615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10060615 = 5 ⋅2012123.

It can be written as a sum of positive squares in 2 ways, for example, as 17977600 + 33628401 = 4240^2 + 5799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51606001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51606001.

It is not an unprimeable number, because it can be changed into a prime (51606007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173026 + ... + 173323.

It is an arithmetic number, because the mean of its divisors is an integer number (12988125).

Almost surely, 2^51606001 is an apocalyptic number.

It is an amenable number.

51606001 is a deficient number, since it is larger than the sum of its proper divisors (346499).

51606001 is a wasteful number, since it uses less digits than its factorization.

51606001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346498.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 51606001 is about 7183.7316904239. The cubic root of 51606001 is about 372.3060287652.

Adding to 51606001 its reverse (10060615), we get a palindrome (61666616).

The spelling of 51606001 in words is "fifty-one million, six hundred six thousand, one".