225784531509 has 8 divisors (see below), whose sum is σ = 301073880192. Its totient is φ = 150509101920.

The previous prime is 225784531499. The next prime is 225784531519. The reversal of 225784531509 is 905135487522.

It is an interprime number because it is at equal distance from previous prime (225784531499) and next prime (225784531519).

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

It is not a de Polignac number, because 225784531509 - 2⁷ = 225784531381 is a prime.

It is a super-2 number, since 2×225784531509² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225784531519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3441864 + ... + 3506849.

It is an arithmetic number, because the mean of its divisors is an integer number (37634235024).

Almost surely, 2^225784531509 is an apocalyptic number.

It is an amenable number.

225784531509 is a deficient number, since it is larger than the sum of its proper divisors (75289348683).

225784531509 is a wasteful number, since it uses less digits than its factorization.

225784531509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6959547.

The product of its (nonzero) digits is 3024000, while the sum is 51.

The spelling of 225784531509 in words is "two hundred twenty-five billion, seven hundred eighty-four million, five hundred thirty-one thousand, five hundred nine".