51643016 has 8 divisors (see below), whose sum is σ = 96830670. Its totient is φ = 25821504.

The previous prime is 51642979. The next prime is 51643037. The reversal of 51643016 is 61034615.

It can be written as a sum of positive squares in only one way, i.e., 30758116 + 20884900 = 5546^2 + 4570^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×51643016² = 5334002203152512, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3227681 + ... + 3227696.

Almost surely, 2^51643016 is an apocalyptic number.

It is an amenable number.

51643016 is a deficient number, since it is larger than the sum of its proper divisors (45187654).

51643016 is a wasteful number, since it uses less digits than its factorization.

51643016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6455383 (or 6455379 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 51643016 is about 7186.3075358629. The cubic root of 51643016 is about 372.3950210907.

The spelling of 51643016 in words is "fifty-one million, six hundred forty-three thousand, sixteen".