51638202 has 96 divisors (see below), whose sum is σ = 144278400. Its totient is φ = 13400640.

The previous prime is 51638179. The next prime is 51638261. The reversal of 51638202 is 20283615.

51638202 is a `hidden beast` number, since 5 + 1 + 638 + 20 + 2 = 666.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45174 + ... + 46302.

It is an arithmetic number, because the mean of its divisors is an integer number (1502900).

Almost surely, 2^51638202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51638202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72139200).

51638202 is an abundant number, since it is smaller than the sum of its proper divisors (92640198).

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

51638202 is a wasteful number, since it uses less digits than its factorization.

51638202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169 (or 1152 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 51638202 is about 7185.9725855308. The cubic root of 51638202 is about 372.3834495658.

The spelling of 51638202 in words is "fifty-one million, six hundred thirty-eight thousand, two hundred two".