225771731 has 4 divisors (see below), whose sum is σ = 225984000. Its totient is φ = 225559464.

The previous prime is 225771697. The next prime is 225771751. The reversal of 225771731 is 137177522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225771731 is a prime.

It is a super-2 number, since 2×225771731² = 101945749037472722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225771691 and 225771700.

It is not an unprimeable number, because it can be changed into a prime (225771751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104531 + ... + 106668.

It is an arithmetic number, because the mean of its divisors is an integer number (56496000).

Almost surely, 2^225771731 is an apocalyptic number.

225771731 is a deficient number, since it is larger than the sum of its proper divisors (212269).

225771731 is a wasteful number, since it uses less digits than its factorization.

225771731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212268.

The product of its digits is 20580, while the sum is 35.

The square root of 225771731 is about 15025.7023463131. The cubic root of 225771731 is about 608.9147873437.

The spelling of 225771731 in words is "two hundred twenty-five million, seven hundred seventy-one thousand, seven hundred thirty-one".