51202245 has 16 divisors (see below), whose sum is σ = 86235840. Its totient is φ = 25870464.

The previous prime is 51202231. The next prime is 51202247. The reversal of 51202245 is 54220215.

Added to its reverse (54220215) it gives a triangular number (105422460 = T₁₄₅₂₀).

It is a happy number.

It is not a de Polignac number, because 51202245 - 2¹⁰ = 51201221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51202247) 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, 89544 + ... + 90113.

It is an arithmetic number, because the mean of its divisors is an integer number (5389740).

Almost surely, 2^51202245 is an apocalyptic number.

It is an amenable number.

51202245 is a deficient number, since it is larger than the sum of its proper divisors (35033595).

51202245 is a wasteful number, since it uses less digits than its factorization.

51202245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179684.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 51202245 is about 7155.5744004238. The cubic root of 51202245 is about 371.3325338841.

Adding to 51202245 its reverse (54220215), we get a triangular number (105422460 = T₁₄₅₂₀).

The spelling of 51202245 in words is "fifty-one million, two hundred two thousand, two hundred forty-five".