225451640 has 16 divisors (see below), whose sum is σ = 507266280. Its totient is φ = 90180640.

The previous prime is 225451631. The next prime is 225451649. The reversal of 225451640 is 46154522.

225451640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (225451631) and next prime (225451649).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225451649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2818106 + ... + 2818185.

Almost surely, 2^225451640 is an apocalyptic number.

225451640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225451640 is an abundant number, since it is smaller than the sum of its proper divisors (281814640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225451640 is a wasteful number, since it uses less digits than its factorization.

225451640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5636302 (or 5636298 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 225451640 is about 15015.0471194732. The cubic root of 225451640 is about 608.6268854494.

The spelling of 225451640 in words is "two hundred twenty-five million, four hundred fifty-one thousand, six hundred forty".