225279031 has 2 divisors, whose sum is σ = 225279032. Its totient is φ = 225279030.

The previous prime is 225279023. The next prime is 225279071. The reversal of 225279031 is 130972522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225279031 - 2³ = 225279023 is a prime.

It is a super-2 number, since 2×225279031² = 101501283616597922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225278984 and 225279002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225279001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112639515 + 112639516.

It is an arithmetic number, because the mean of its divisors is an integer number (112639516).

Almost surely, 2^225279031 is an apocalyptic number.

225279031 is a deficient number, since it is larger than the sum of its proper divisors (1).

225279031 is an equidigital number, since it uses as much as digits as its factorization.

225279031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 225279031 is about 15009.2981514793. The cubic root of 225279031 is about 608.4715213103.

The spelling of 225279031 in words is "two hundred twenty-five million, two hundred seventy-nine thousand, thirty-one".