51821602 has 8 divisors (see below), whose sum is σ = 88837056. Its totient is φ = 22209252.

The previous prime is 51821591. The next prime is 51821629. The reversal of 51821602 is 20612815.

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

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, 1850758 + ... + 1850785.

It is an arithmetic number, because the mean of its divisors is an integer number (11104632).

Almost surely, 2^51821602 is an apocalyptic number.

51821602 is a deficient number, since it is larger than the sum of its proper divisors (37015454).

51821602 is a wasteful number, since it uses less digits than its factorization.

51821602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701552.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 51821602 is about 7198.7222477326. The cubic root of 51821602 is about 372.8237852609.

The spelling of 51821602 in words is "fifty-one million, eight hundred twenty-one thousand, six hundred two".