51617616 has 40 divisors (see below), whose sum is σ = 133783104. Its totient is φ = 17149440.

The previous prime is 51617611. The next prime is 51617633. The reversal of 51617616 is 61671615.

51617616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51617611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14581 + ... + 17771.

Almost surely, 2^51617616 is an apocalyptic number.

It is an amenable number.

51617616 is an abundant number, since it is smaller than the sum of its proper divisors (82165488).

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

51617616 is a wasteful number, since it uses less digits than its factorization.

51617616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539 (or 3533 counting only the distinct ones).

The product of its digits is 7560, while the sum is 33.

The square root of 51617616 is about 7184.5400687866. The cubic root of 51617616 is about 372.3339583990. Note that the first 3 decimals are identical.

The spelling of 51617616 in words is "fifty-one million, six hundred seventeen thousand, six hundred sixteen".