51917642 has 16 divisors (see below), whose sum is σ = 89229120. Its totient is φ = 22193568.

The previous prime is 51917617. The next prime is 51917659. The reversal of 51917642 is 24671915.

It is a super-3 number, since 3×51917642³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

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, 1193 + ... + 10259.

It is an arithmetic number, because the mean of its divisors is an integer number (5576820).

Almost surely, 2^51917642 is an apocalyptic number.

51917642 is a deficient number, since it is larger than the sum of its proper divisors (37311478).

51917642 is a wasteful number, since it uses less digits than its factorization.

51917642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9485.

The product of its digits is 15120, while the sum is 35.

The square root of 51917642 is about 7205.3897882072. The cubic root of 51917642 is about 373.0539588962.

The spelling of 51917642 in words is "fifty-one million, nine hundred seventeen thousand, six hundred forty-two".