521034023 has 4 divisors (see below), whose sum is σ = 521678880. Its totient is φ = 520389168.

The previous prime is 521034013. The next prime is 521034079. The reversal of 521034023 is 320430125.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 521034023 - 2⁶ = 521033959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521033986 and 521034004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521034013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 321215 + ... + 322832.

It is an arithmetic number, because the mean of its divisors is an integer number (130419720).

Almost surely, 2^521034023 is an apocalyptic number.

521034023 is a deficient number, since it is larger than the sum of its proper divisors (644857).

521034023 is an equidigital number, since it uses as much as digits as its factorization.

521034023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644856.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 521034023 is about 22826.1696962062. The cubic root of 521034023 is about 804.6778145638.

Adding to 521034023 its reverse (320430125), we get a palindrome (841464148).

The spelling of 521034023 in words is "five hundred twenty-one million, thirty-four thousand, twenty-three".