521222523 has 16 divisors (see below), whose sum is σ = 698844672. Its totient is φ = 345548000.

The previous prime is 521222521. The next prime is 521222543. The reversal of 521222523 is 325222125.

It is a cyclic number.

It is not a de Polignac number, because 521222523 - 2¹ = 521222521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521222493 and 521222502.

It is not an unprimeable number, because it can be changed into a prime (521222521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634453 + ... + 635273.

It is an arithmetic number, because the mean of its divisors is an integer number (43677792).

Almost surely, 2^521222523 is an apocalyptic number.

521222523 is a deficient number, since it is larger than the sum of its proper divisors (177622149).

521222523 is a wasteful number, since it uses less digits than its factorization.

521222523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746.

The product of its digits is 2400, while the sum is 24.

The square root of 521222523 is about 22830.2983554749. The cubic root of 521222523 is about 804.7748418040.

Adding to 521222523 its reverse (325222125), we get a palindrome (846444648).

It can be divided in two parts, 52122 and 2523, that added together give a palindrome (54645).

The spelling of 521222523 in words is "five hundred twenty-one million, two hundred twenty-two thousand, five hundred twenty-three".