51775669 has 8 divisors (see below), whose sum is σ = 56654208. Its totient is φ = 46925760.

The previous prime is 51775667. The next prime is 51775679. The reversal of 51775669 is 96657715.

It is a happy number.

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 51775669 - 2¹ = 51775667 is a prime.

It is a super-2 number, since 2×51775669² = 5361439800795122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51775667) 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, 3277 + ... + 10690.

It is an arithmetic number, because the mean of its divisors is an integer number (7081776).

Almost surely, 2^51775669 is an apocalyptic number.

It is an amenable number.

51775669 is a deficient number, since it is larger than the sum of its proper divisors (4878539).

51775669 is a wasteful number, since it uses less digits than its factorization.

51775669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14315.

The product of its digits is 396900, while the sum is 46.

The square root of 51775669 is about 7195.5311826161. The cubic root of 51775669 is about 372.7135996985.

The spelling of 51775669 in words is "fifty-one million, seven hundred seventy-five thousand, six hundred sixty-nine".