225745739 has 4 divisors (see below), whose sum is σ = 228603360. Its totient is φ = 222888120.

The previous prime is 225745733. The next prime is 225745789. The reversal of 225745739 is 937547522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937547522 = 2 ⋅468773761.

It is a cyclic number.

It is not a de Polignac number, because 225745739 - 2¹² = 225741643 is a prime.

It is a super-2 number, since 2×225745739² = 101922277353312242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225745739.

It is not an unprimeable number, because it can be changed into a prime (225745733) 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, 1428692 + ... + 1428849.

It is an arithmetic number, because the mean of its divisors is an integer number (57150840).

Almost surely, 2^225745739 is an apocalyptic number.

225745739 is a deficient number, since it is larger than the sum of its proper divisors (2857621).

225745739 is an equidigital number, since it uses as much as digits as its factorization.

225745739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857620.

The product of its digits is 529200, while the sum is 44.

The square root of 225745739 is about 15024.8374034463. The cubic root of 225745739 is about 608.8914193154.

The spelling of 225745739 in words is "two hundred twenty-five million, seven hundred forty-five thousand, seven hundred thirty-nine".