225125531 has 2 divisors, whose sum is σ = 225125532. Its totient is φ = 225125530.

The previous prime is 225125491. The next prime is 225125569. The reversal of 225125531 is 135521522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225125531 - 2¹⁰ = 225124507 is a prime.

It is a super-2 number, since 2×225125531² = 101363009416063922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225125531.

It is not a weakly prime, because it can be changed into another prime (225124531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112562765 + 112562766.

It is an arithmetic number, because the mean of its divisors is an integer number (112562766).

Almost surely, 2^225125531 is an apocalyptic number.

225125531 is a deficient number, since it is larger than the sum of its proper divisors (1).

225125531 is an equidigital number, since it uses as much as digits as its factorization.

225125531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000, while the sum is 26.

The square root of 225125531 is about 15004.1837831986. The cubic root of 225125531 is about 608.3332903651. Note that the first 3 decimals are identical.

The spelling of 225125531 in words is "two hundred twenty-five million, one hundred twenty-five thousand, five hundred thirty-one".