64403225 has 12 divisors (see below), whose sum is σ = 84558204. Its totient is φ = 48491520.

The previous prime is 64403221. The next prime is 64403231. The reversal of 64403225 is 52230446.

It can be written as a sum of positive squares in 6 ways, for example, as 355216 + 64048009 = 596^2 + 8003^2 .

It is not a de Polignac number, because 64403225 - 2² = 64403221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64403194 and 64403203.

It is not an unprimeable number, because it can be changed into a prime (64403221) 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, 75344 + ... + 76193.

It is an arithmetic number, because the mean of its divisors is an integer number (7046517).

Almost surely, 2^64403225 is an apocalyptic number.

It is an amenable number.

64403225 is a deficient number, since it is larger than the sum of its proper divisors (20154979).

64403225 is a wasteful number, since it uses less digits than its factorization.

64403225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151564 (or 151559 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 64403225 is about 8025.1619921345. The cubic root of 64403225 is about 400.8382940139.

It can be divided in two parts, 64 and 403225, that multiplied together give a square (25806400 = 5080²).

The spelling of 64403225 in words is "sixty-four million, four hundred three thousand, two hundred twenty-five".