51632911 has 4 divisors (see below), whose sum is σ = 56326824. Its totient is φ = 46939000.

The previous prime is 51632909. The next prime is 51632923. The reversal of 51632911 is 11923615.

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

It is a cyclic number.

It is not a de Polignac number, because 51632911 - 2¹ = 51632909 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 51632911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51635911) 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, 2346940 + ... + 2346961.

It is an arithmetic number, because the mean of its divisors is an integer number (14081706).

Almost surely, 2^51632911 is an apocalyptic number.

51632911 is the 3214-th centered decagonal number.

51632911 is a deficient number, since it is larger than the sum of its proper divisors (4693913).

51632911 is a wasteful number, since it uses less digits than its factorization.

51632911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4693912.

The product of its digits is 1620, while the sum is 28.

The square root of 51632911 is about 7185.6044282997. The cubic root of 51632911 is about 372.3707306352.

The spelling of 51632911 in words is "fifty-one million, six hundred thirty-two thousand, nine hundred eleven".