51973225 has 6 divisors (see below), whose sum is σ = 64446830. Its totient is φ = 41578560.

The previous prime is 51973223. The next prime is 51973237. The reversal of 51973225 is 52237915.

It can be written as a sum of positive squares in 3 ways, for example, as 16224784 + 35748441 = 4028^2 + 5979^2 .

It is not a de Polignac number, because 51973225 - 2¹ = 51973223 is a prime.

It is a super-2 number, since 2×51973225² = 5402432233801250, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51973223) 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 5 ways as a sum of consecutive naturals, for example, 1039440 + ... + 1039489.

Almost surely, 2^51973225 is an apocalyptic number.

It is an amenable number.

51973225 is a deficient number, since it is larger than the sum of its proper divisors (12473605).

51973225 is a wasteful number, since it uses less digits than its factorization.

51973225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078939 (or 2078934 counting only the distinct ones).

The product of its digits is 18900, while the sum is 34.

The square root of 51973225 is about 7209.2457996659. The cubic root of 51973225 is about 373.1870418715.

The spelling of 51973225 in words is "fifty-one million, nine hundred seventy-three thousand, two hundred twenty-five".