521226043452145 has 8 divisors (see below), whose sum is σ = 662263678739304. Its totient is φ = 392452550363904.

The previous prime is 521226043452089. The next prime is 521226043452217. The reversal of 521226043452145 is 541254340622125.

It can be written as a sum of positive squares in 4 ways, for example, as 122413600708624 + 398812442743521 = 11064068^2 + 19970289^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521226043452145 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521226043452095 and 521226043452104.

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, 3066035549634 + ... + 3066035549803.

It is an arithmetic number, because the mean of its divisors is an integer number (82782959842413).

Almost surely, 2^{521226043452145} is an apocalyptic number.

It is an amenable number.

521226043452145 is a deficient number, since it is larger than the sum of its proper divisors (141037635287159).

521226043452145 is a wasteful number, since it uses less digits than its factorization.

521226043452145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6132071099459.

The product of its (nonzero) digits is 2304000, while the sum is 46.

The spelling of 521226043452145 in words is "five hundred twenty-one trillion, two hundred twenty-six billion, forty-three million, four hundred fifty-two thousand, one hundred forty-five".