51662201 has 8 divisors (see below), whose sum is σ = 54772200. Its totient is φ = 48560128.

The previous prime is 51662183. The next prime is 51662231. The reversal of 51662201 is 10226615.

51662201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14440000 + 37222201 = 3800^2 + 6101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51662201 - 2¹⁴ = 51645817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51662231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16385 + ... + 19281.

It is an arithmetic number, because the mean of its divisors is an integer number (6846525).

Almost surely, 2^51662201 is an apocalyptic number.

It is an amenable number.

51662201 is a deficient number, since it is larger than the sum of its proper divisors (3109999).

51662201 is a wasteful number, since it uses less digits than its factorization.

51662201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3963.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 51662201 is about 7187.6422420708. The cubic root of 51662201 is about 372.4411293839.

Adding to 51662201 its reverse (10226615), we get a palindrome (61888816).

The spelling of 51662201 in words is "fifty-one million, six hundred sixty-two thousand, two hundred one".