51452225 has 36 divisors (see below), whose sum is σ = 71393868.
Its totient is φ = 36748800.
The previous prime is 51452213. The next prime is 51452227. The reversal of 51452225 is 52225415.
It can be written as a sum of positive squares in 6 ways, for example, as 3579664 + 47872561 = 1892^2 + 6919^2
It is not a de Polignac number, because 51452225 - 28 = 51451969 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 51452194 and 51452203.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (51452227) by changing a digit.
It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 220709 + ... + 220941.
It is an arithmetic number, because the mean of its divisors is an integer number (1983163).
Almost surely, 251452225 is an apocalyptic number.
51452225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.
It is an amenable number.
51452225 is a deficient number, since it is larger than the sum of its proper divisors (19941643).
51452225 is a wasteful number, since it uses less digits than its factorization.
51452225 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 338 (or 322 counting only the distinct ones).
The product of its digits is 4000, while the sum is 26.
The square root of 51452225 is about 7173.0206328994.
The cubic root of 51452225 is about 371.9358606226.
The spelling of 51452225 in words is "fifty-one million, four hundred fifty-two thousand, two hundred twenty-five".