51453225 has 30 divisors (see below), whose sum is σ = 95312910. Its totient is φ = 27440640.

The previous prime is 51453223. The next prime is 51453239. The reversal of 51453225 is 52235415.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1296 + 51451929 = 36^2 + 7173^2 .

It is not a de Polignac number, because 51453225 - 2¹ = 51453223 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51453223) 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 29 ways as a sum of consecutive naturals, for example, 10680 + ... + 14729.

It is an arithmetic number, because the mean of its divisors is an integer number (3177097).

Almost surely, 2^51453225 is an apocalyptic number.

It is an amenable number.

51453225 is a deficient number, since it is larger than the sum of its proper divisors (43859685).

51453225 is a wasteful number, since it uses less digits than its factorization.

51453225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25431 (or 25417 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 51453225 is about 7173.0903382015. The cubic root of 51453225 is about 371.9382701941.

The spelling of 51453225 in words is "fifty-one million, four hundred fifty-three thousand, two hundred twenty-five".