225213523 has 4 divisors (see below), whose sum is σ = 225244888. Its totient is φ = 225182160.

The previous prime is 225213509. The next prime is 225213551. The reversal of 225213523 is 325312522.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 225213523 - 2⁹ = 225213011 is a prime.

It is a super-2 number, since 2×225213523² = 101442261884143058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225213503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1015 + ... + 21247.

It is an arithmetic number, because the mean of its divisors is an integer number (56311222).

Almost surely, 2^225213523 is an apocalyptic number.

225213523 is a deficient number, since it is larger than the sum of its proper divisors (31365).

225213523 is a wasteful number, since it uses less digits than its factorization.

225213523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31364.

The product of its digits is 3600, while the sum is 25.

The square root of 225213523 is about 15007.1157455388. The cubic root of 225213523 is about 608.4125372489.

The spelling of 225213523 in words is "two hundred twenty-five million, two hundred thirteen thousand, five hundred twenty-three".