51807601 has 4 divisors (see below), whose sum is σ = 53594100. Its totient is φ = 50021104.

The previous prime is 51807593. The next prime is 51807611. The reversal of 51807601 is 10670815.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36784225 + 15023376 = 6065^2 + 3876^2 .

It is a cyclic number.

It is not a de Polignac number, because 51807601 - 2³ = 51807593 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 51807601.

It is not an unprimeable number, because it can be changed into a prime (51807611) 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, 893206 + ... + 893263.

It is an arithmetic number, because the mean of its divisors is an integer number (13398525).

Almost surely, 2^51807601 is an apocalyptic number.

It is an amenable number.

51807601 is a deficient number, since it is larger than the sum of its proper divisors (1786499).

51807601 is a wasteful number, since it uses less digits than its factorization.

51807601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786498.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 51807601 is about 7197.7497177937. The cubic root of 51807601 is about 372.7902061112.

The spelling of 51807601 in words is "fifty-one million, eight hundred seven thousand, six hundred one".