521541223225 has 12 divisors (see below), whose sum is σ = 705503036880. Its totient is φ = 379302707600.

The previous prime is 521541223207. The next prime is 521541223241. The reversal of 521541223225 is 522322145125.

It is not a de Polignac number, because 521541223225 - 2⁵ = 521541223193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 948256495 + ... + 948257044.

It is an arithmetic number, because the mean of its divisors is an integer number (58791919740).

Almost surely, 2^521541223225 is an apocalyptic number.

521541223225 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

521541223225 is a deficient number, since it is larger than the sum of its proper divisors (183961813655).

521541223225 is a wasteful number, since it uses less digits than its factorization.

521541223225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896513560 (or 1896513555 counting only the distinct ones).

The product of its digits is 48000, while the sum is 34.

The spelling of 521541223225 in words is "five hundred twenty-one billion, five hundred forty-one million, two hundred twenty-three thousand, two hundred twenty-five".