51306601 has 4 divisors (see below), whose sum is σ = 51321600. Its totient is φ = 51291604.

The previous prime is 51306599. The next prime is 51306623. The reversal of 51306601 is 10660315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10660315 = 5 ⋅2132063.

It is a cyclic number.

It is not a de Polignac number, because 51306601 - 2¹ = 51306599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51306001) 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, 420 + ... + 10138.

It is an arithmetic number, because the mean of its divisors is an integer number (12830400).

Almost surely, 2^51306601 is an apocalyptic number.

It is an amenable number.

51306601 is a deficient number, since it is larger than the sum of its proper divisors (14999).

51306601 is an equidigital number, since it uses as much as digits as its factorization.

51306601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14998.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 51306601 is about 7162.8626260735. The cubic root of 51306601 is about 371.5846353399.

Adding to 51306601 its reverse (10660315), we get a palindrome (61966916).

The spelling of 51306601 in words is "fifty-one million, three hundred six thousand, six hundred one".