51287202 has 32 divisors (see below), whose sum is σ = 115090560. Its totient is φ = 16927920.

The previous prime is 51287191. The next prime is 51287209. The reversal of 51287202 is 20278215.

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

It is not an unprimeable number, because it can be changed into a prime (51287209) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 952 + ... + 10172.

It is an arithmetic number, because the mean of its divisors is an integer number (3596580).

Almost surely, 2^51287202 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51287202, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57545280).

51287202 is an abundant number, since it is smaller than the sum of its proper divisors (63803358).

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

51287202 is a wasteful number, since it uses less digits than its factorization.

51287202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9335 (or 9329 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 51287202 is about 7161.5083606737. The cubic root of 51287202 is about 371.5377974485.

The spelling of 51287202 in words is "fifty-one million, two hundred eighty-seven thousand, two hundred two".