51662101 has 4 divisors (see below), whose sum is σ = 53058412. Its totient is φ = 50265792.

The previous prime is 51662069. The next prime is 51662113. The reversal of 51662101 is 10126615.

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 44209201 + 7452900 = 6649^2 + 2730^2 .

It is a cyclic number.

It is not a de Polignac number, because 51662101 - 2⁵ = 51662069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51662141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698100 + ... + 698173.

It is an arithmetic number, because the mean of its divisors is an integer number (13264603).

Almost surely, 2^51662101 is an apocalyptic number.

It is an amenable number.

51662101 is a deficient number, since it is larger than the sum of its proper divisors (1396311).

51662101 is a wasteful number, since it uses less digits than its factorization.

51662101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396310.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 51662101 is about 7187.6352856833. The cubic root of 51662101 is about 372.4408890784.

Adding to 51662101 its reverse (10126615), we get a palindrome (61788716).

The spelling of 51662101 in words is "fifty-one million, six hundred sixty-two thousand, one hundred one".