51656201 has 4 divisors (see below), whose sum is σ = 52857552. Its totient is φ = 50454852.

The previous prime is 51656197. The next prime is 51656233. The reversal of 51656201 is 10265615.

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.

It is a cyclic number.

It is not a de Polignac number, because 51656201 - 2² = 51656197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51656281) 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, 600611 + ... + 600696.

It is an arithmetic number, because the mean of its divisors is an integer number (13214388).

Almost surely, 2^51656201 is an apocalyptic number.

It is an amenable number.

51656201 is a deficient number, since it is larger than the sum of its proper divisors (1201351).

51656201 is a wasteful number, since it uses less digits than its factorization.

51656201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201350.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 51656201 is about 7187.2248469072. The cubic root of 51656201 is about 372.4267105035.

The spelling of 51656201 in words is "fifty-one million, six hundred fifty-six thousand, two hundred one".