243225214546520 has 32 divisors (see below), whose sum is σ = 579448305244800. Its totient is φ = 91567139593728.

The previous prime is 243225214546487. The next prime is 243225214546529. The reversal of 243225214546520 is 25645412522342.

It is a super-2 number, since 2×243225214546520² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243225214546529) 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, 178842068840 + ... + 178842070199.

It is an arithmetic number, because the mean of its divisors is an integer number (18107759538900).

Almost surely, 2^{243225214546520} is an apocalyptic number.

243225214546520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243225214546520 is an abundant number, since it is smaller than the sum of its proper divisors (336223090698280).

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

243225214546520 is a wasteful number, since it uses less digits than its factorization.

243225214546520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357684139067 (or 357684139063 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 47.

The spelling of 243225214546520 in words is "two hundred forty-three trillion, two hundred twenty-five billion, two hundred fourteen million, five hundred forty-six thousand, five hundred twenty".