51455225 has 12 divisors (see below), whose sum is σ = 64092624. Its totient is φ = 40978320.

The previous prime is 51455221. The next prime is 51455227. The reversal of 51455225 is 52255415.

It is not a de Polignac number, because 51455225 - 2² = 51455221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51455221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1142 + ... + 10208.

It is an arithmetic number, because the mean of its divisors is an integer number (5341052).

Almost surely, 2^51455225 is an apocalyptic number.

It is an amenable number.

51455225 is a deficient number, since it is larger than the sum of its proper divisors (12637399).

51455225 is a wasteful number, since it uses less digits than its factorization.

51455225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9304 (or 9299 counting only the distinct ones).

The product of its digits is 10000, while the sum is 29.

The square root of 51455225 is about 7173.2297467738. The cubic root of 51455225 is about 371.9430892436.

The spelling of 51455225 in words is "fifty-one million, four hundred fifty-five thousand, two hundred twenty-five".