51055631 has 8 divisors (see below), whose sum is σ = 57618000. Its totient is φ = 44813440.

The previous prime is 51055553. The next prime is 51055643. The reversal of 51055631 is 13655015.

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 51055631 - 2¹⁰ = 51054607 is a prime.

It is a super-2 number, since 2×51055631² = 5213354913616322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51055631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51055681) 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 7 ways as a sum of consecutive naturals, for example, 79706 + ... + 80343.

It is an arithmetic number, because the mean of its divisors is an integer number (7202250).

Almost surely, 2^51055631 is an apocalyptic number.

51055631 is a deficient number, since it is larger than the sum of its proper divisors (6562369).

51055631 is a wasteful number, since it uses less digits than its factorization.

51055631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160089.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 51055631 is about 7145.3223160331. The cubic root of 51055631 is about 370.9777669198.

The spelling of 51055631 in words is "fifty-one million, fifty-five thousand, six hundred thirty-one".