51205202 has 4 divisors (see below), whose sum is σ = 76807806. Its totient is φ = 25602600.

The previous prime is 51205201. The next prime is 51205223. The reversal of 51205202 is 20250215.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 28633201 + 22572001 = 5351^2 + 4751^2 .

It is not an unprimeable number, because it can be changed into a prime (51205201) 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 as a sum of consecutive naturals, namely, 12801299 + ... + 12801302.

Almost surely, 2^51205202 is an apocalyptic number.

51205202 is a deficient number, since it is larger than the sum of its proper divisors (25602604).

51205202 is a wasteful number, since it uses less digits than its factorization.

51205202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25602603.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 51205202 is about 7155.7810195673. The cubic root of 51205202 is about 371.3396820679.

Adding to 51205202 its reverse (20250215), we get a palindrome (71455417).

The spelling of 51205202 in words is "fifty-one million, two hundred five thousand, two hundred two".