225431523 has 12 divisors (see below), whose sum is σ = 342761640. Its totient is φ = 142377696.

The previous prime is 225431501. The next prime is 225431573. The reversal of 225431523 is 325134522.

It is a happy number.

225431523 is a `hidden beast` number, since 225 + 431 + 5 + 2 + 3 = 666.

It is not a de Polignac number, because 225431523 - 2¹² = 225427427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225431573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 658986 + ... + 659327.

It is an arithmetic number, because the mean of its divisors is an integer number (28563470).

Almost surely, 2^225431523 is an apocalyptic number.

225431523 is a deficient number, since it is larger than the sum of its proper divisors (117330117).

225431523 is a wasteful number, since it uses less digits than its factorization.

225431523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318338 (or 1318335 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 225431523 is about 15014.3772098612. The cubic root of 225431523 is about 608.6087823635.

The spelling of 225431523 in words is "two hundred twenty-five million, four hundred thirty-one thousand, five hundred twenty-three".