225743247 has 16 divisors (see below), whose sum is σ = 334666080. Its totient is φ = 150391296.

The previous prime is 225743233. The next prime is 225743267. The reversal of 225743247 is 742347522.

It is a happy number.

It is not a de Polignac number, because 225743247 - 2¹¹ = 225741199 is a prime.

It is a super-2 number, since 2×225743247² = 101920027132206018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225743207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72813 + ... + 75849.

It is an arithmetic number, because the mean of its divisors is an integer number (20916630).

Almost surely, 2^225743247 is an apocalyptic number.

225743247 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

225743247 is a deficient number, since it is larger than the sum of its proper divisors (108922833).

225743247 is a wasteful number, since it uses less digits than its factorization.

225743247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5799 (or 5793 counting only the distinct ones).

The product of its digits is 94080, while the sum is 36.

The square root of 225743247 is about 15024.7544738675. The cubic root of 225743247 is about 608.8891787962.

The spelling of 225743247 in words is "two hundred twenty-five million, seven hundred forty-three thousand, two hundred forty-seven".