225247857 has 8 divisors (see below), whose sum is σ = 301620384. Its totient is φ = 149520288.

The previous prime is 225247853. The next prime is 225247859. The reversal of 225247857 is 758742522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225247857 - 2² = 225247853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225247853) 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 7 ways as a sum of consecutive naturals, for example, 160423 + ... + 161820.

It is an arithmetic number, because the mean of its divisors is an integer number (37702548).

Almost surely, 2^225247857 is an apocalyptic number.

It is an amenable number.

225247857 is a deficient number, since it is larger than the sum of its proper divisors (76372527).

225247857 is a wasteful number, since it uses less digits than its factorization.

225247857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322479.

The product of its digits is 313600, while the sum is 42.

The square root of 225247857 is about 15008.2596259526. The cubic root of 225247857 is about 608.4434533537.

It can be divided in two parts, 22524 and 7857, that added together give a triangular number (30381 = T₂₄₆).

The spelling of 225247857 in words is "two hundred twenty-five million, two hundred forty-seven thousand, eight hundred fifty-seven".