55415225 has 6 divisors (see below), whose sum is σ = 68714910. Its totient is φ = 44332160.

The previous prime is 55415221. The next prime is 55415251. The reversal of 55415225 is 52251455.

It can be written as a sum of positive squares in 3 ways, for example, as 477481 + 54937744 = 691^2 + 7412^2 .

It is not a de Polignac number, because 55415225 - 2² = 55415221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55415221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1108280 + ... + 1108329.

It is an arithmetic number, because the mean of its divisors is an integer number (11452485).

Almost surely, 2^55415225 is an apocalyptic number.

It is an amenable number.

55415225 is a deficient number, since it is larger than the sum of its proper divisors (13299685).

55415225 is a wasteful number, since it uses less digits than its factorization.

55415225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216619 (or 2216614 counting only the distinct ones).

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

The square root of 55415225 is about 7444.1403130247. The cubic root of 55415225 is about 381.2498665233.

The spelling of 55415225 in words is "fifty-five million, four hundred fifteen thousand, two hundred twenty-five".