521224413 has 8 divisors (see below), whose sum is σ = 725181888. Its totient is φ = 332374944.

The previous prime is 521224409. The next prime is 521224427. The reversal of 521224413 is 314422125.

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

It is not a de Polignac number, because 521224413 - 2² = 521224409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521224463) 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, 3776920 + ... + 3777057.

It is an arithmetic number, because the mean of its divisors is an integer number (90647736).

Almost surely, 2^521224413 is an apocalyptic number.

It is an amenable number.

521224413 is a deficient number, since it is larger than the sum of its proper divisors (203957475).

521224413 is a wasteful number, since it uses less digits than its factorization.

521224413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7554003.

The product of its digits is 1920, while the sum is 24.

The square root of 521224413 is about 22830.3397478005. The cubic root of 521224413 is about 804.7758145316.

Adding to 521224413 its reverse (314422125), we get a palindrome (835646538).

The spelling of 521224413 in words is "five hundred twenty-one million, two hundred twenty-four thousand, four hundred thirteen".