51465225 has 48 divisors (see below), whose sum is σ = 97993728. Its totient is φ = 23346240.

The previous prime is 51465223. The next prime is 51465233. The reversal of 51465225 is 52256415.

It is not a de Polignac number, because 51465225 - 2¹ = 51465223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51465192 and 51465201.

It is not an unprimeable number, because it can be changed into a prime (51465223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87382 + ... + 87968.

It is an arithmetic number, because the mean of its divisors is an integer number (2041536).

Almost surely, 2^51465225 is an apocalyptic number.

It is an amenable number.

51465225 is a deficient number, since it is larger than the sum of its proper divisors (46528503).

51465225 is a wasteful number, since it uses less digits than its factorization.

51465225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 769 counting only the distinct ones).

The product of its digits is 12000, while the sum is 30.

The square root of 51465225 is about 7173.9267489988. The cubic root of 51465225 is about 371.9671826178.

The spelling of 51465225 in words is "fifty-one million, four hundred sixty-five thousand, two hundred twenty-five".