51638322 has 8 divisors (see below), whose sum is σ = 103276656. Its totient is φ = 17212772.

The previous prime is 51638309. The next prime is 51638339. The reversal of 51638322 is 22383615.

It is a sphenic number, since it is the product of 3 distinct primes.

51638322 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 51638322.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4303188 + ... + 4303199.

It is an arithmetic number, because the mean of its divisors is an integer number (12909582).

Almost surely, 2^51638322 is an apocalyptic number.

51638322 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51638322 is a wasteful number, since it uses less digits than its factorization.

51638322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8606392.

The product of its digits is 8640, while the sum is 30.

The square root of 51638322 is about 7185.9809351264. The cubic root of 51638322 is about 372.3837380214.

The spelling of 51638322 in words is "fifty-one million, six hundred thirty-eight thousand, three hundred twenty-two".