51911201 has 4 divisors (see below), whose sum is σ = 51952404. Its totient is φ = 51870000.

The previous prime is 51911129. The next prime is 51911213. The reversal of 51911201 is 10211915.

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 774400 + 51136801 = 880^2 + 7151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51911201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51911231) 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, 18650 + ... + 21251.

It is an arithmetic number, because the mean of its divisors is an integer number (12988101).

Almost surely, 2^51911201 is an apocalyptic number.

It is an amenable number.

51911201 is a deficient number, since it is larger than the sum of its proper divisors (41203).

51911201 is a wasteful number, since it uses less digits than its factorization.

51911201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41202.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 51911201 is about 7204.9428172609. The cubic root of 51911201 is about 373.0385310003.

The spelling of 51911201 in words is "fifty-one million, nine hundred eleven thousand, two hundred one".