225523445424520 has 32 divisors (see below), whose sum is σ = 524925260904600. Its totient is φ = 87098709956608.

The previous prime is 225523445424503. The next prime is 225523445424559. The reversal of 225523445424520 is 25424544325522.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 147015091500484 + 78508353924036 = 12124978^2 + 8860494^2 .

It is a super-2 number, since 2×225523445424520² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97208380489 + ... + 97208382808.

Almost surely, 2^{225523445424520} is an apocalyptic number.

225523445424520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225523445424520 is an abundant number, since it is smaller than the sum of its proper divisors (299401815480080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225523445424520 is a wasteful number, since it uses less digits than its factorization.

225523445424520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194416763337 (or 194416763333 counting only the distinct ones).

The product of its (nonzero) digits is 15360000, while the sum is 49.

The spelling of 225523445424520 in words is "two hundred twenty-five trillion, five hundred twenty-three billion, four hundred forty-five million, four hundred twenty-four thousand, five hundred twenty".