521412513 has 8 divisors (see below), whose sum is σ = 699821376. Its totient is φ = 345306000.

The previous prime is 521412511. The next prime is 521412533. The reversal of 521412513 is 315214125.

It is a happy number.

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

It is not a de Polignac number, because 521412513 - 2¹ = 521412511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (521412511) 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, 575058 + ... + 575963.

It is an arithmetic number, because the mean of its divisors is an integer number (87477672).

Almost surely, 2^521412513 is an apocalyptic number.

It is an amenable number.

521412513 is a deficient number, since it is larger than the sum of its proper divisors (178408863).

521412513 is a wasteful number, since it uses less digits than its factorization.

521412513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151175.

The product of its digits is 1200, while the sum is 24.

The square root of 521412513 is about 22834.4588943991. The cubic root of 521412513 is about 804.8726123284.

Adding to 521412513 its reverse (315214125), we get a palindrome (836626638).

The spelling of 521412513 in words is "five hundred twenty-one million, four hundred twelve thousand, five hundred thirteen".