225122531 has 4 divisors (see below), whose sum is σ = 226254000. Its totient is φ = 223991064.

The previous prime is 225122519. The next prime is 225122533. The reversal of 225122531 is 135221522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135221522 = 2 ⋅67610761.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225122531 is a prime.

It is a super-2 number, since 2×225122531² = 101360307927691922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225122497 and 225122506.

It is not an unprimeable number, because it can be changed into a prime (225122533) 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, 565436 + ... + 565833.

It is an arithmetic number, because the mean of its divisors is an integer number (56563500).

Almost surely, 2^225122531 is an apocalyptic number.

225122531 is a deficient number, since it is larger than the sum of its proper divisors (1131469).

225122531 is a wasteful number, since it uses less digits than its factorization.

225122531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131468.

The product of its digits is 1200, while the sum is 23.

The square root of 225122531 is about 15004.0838107497. The cubic root of 225122531 is about 608.3305881572.

The spelling of 225122531 in words is "two hundred twenty-five million, one hundred twenty-two thousand, five hundred thirty-one".