51996225 has 12 divisors (see below), whose sum is σ = 85967216. Its totient is φ = 27731280.

The previous prime is 51996223. The next prime is 51996229. The reversal of 51996225 is 52269915.

It is not a de Polignac number, because 51996225 - 2¹ = 51996223 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51996223) 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 11 ways as a sum of consecutive naturals, for example, 346567 + ... + 346716.

Almost surely, 2^51996225 is an apocalyptic number.

It is an amenable number.

51996225 is a deficient number, since it is larger than the sum of its proper divisors (33970991).

51996225 is a wasteful number, since it uses less digits than its factorization.

51996225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693296 (or 693291 counting only the distinct ones).

The product of its digits is 48600, while the sum is 39.

The square root of 51996225 is about 7210.8407970222. The cubic root of 51996225 is about 373.2420832647.

The spelling of 51996225 in words is "fifty-one million, nine hundred ninety-six thousand, two hundred twenty-five".