51669312 has 56 divisors (see below), whose sum is σ = 141134592. Its totient is φ = 16665600.

The previous prime is 51669301. The next prime is 51669313. The reversal of 51669312 is 21396615.

It is a happy number.

It is a super-3 number, since 3×51669312³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51669313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1612 + ... + 10292.

Almost surely, 2^51669312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51669312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70567296).

51669312 is an abundant number, since it is smaller than the sum of its proper divisors (89465280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51669312 is a wasteful number, since it uses less digits than its factorization.

51669312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8727 (or 8717 counting only the distinct ones).

The product of its digits is 9720, while the sum is 33.

The square root of 51669312 is about 7188.1368935212. The cubic root of 51669312 is about 372.4582167148.

The spelling of 51669312 in words is "fifty-one million, six hundred sixty-nine thousand, three hundred twelve".