51643358 has 12 divisors (see below), whose sum is σ = 83882808. Its totient is φ = 23835240.

The previous prime is 51643351. The next prime is 51643367. The reversal of 51643358 is 85334615.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51643351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76058 + ... + 76733.

It is an arithmetic number, because the mean of its divisors is an integer number (6990234).

Almost surely, 2^51643358 is an apocalyptic number.

51643358 is a deficient number, since it is larger than the sum of its proper divisors (32239450).

51643358 is a wasteful number, since it uses less digits than its factorization.

51643358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152819 (or 152806 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The square root of 51643358 is about 7186.3313310757. The cubic root of 51643358 is about 372.3958431368.

The spelling of 51643358 in words is "fifty-one million, six hundred forty-three thousand, three hundred fifty-eight".