520154421 has 4 divisors (see below), whose sum is σ = 693539232. Its totient is φ = 346769612.

The previous prime is 520154387. The next prime is 520154441. The reversal of 520154421 is 124451025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520154421 - 2⁷ = 520154293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 520154391 and 520154400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520154441) 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, 86692401 + ... + 86692406.

It is an arithmetic number, because the mean of its divisors is an integer number (173384808).

Almost surely, 2^520154421 is an apocalyptic number.

It is an amenable number.

520154421 is a deficient number, since it is larger than the sum of its proper divisors (173384811).

520154421 is a wasteful number, since it uses less digits than its factorization.

520154421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173384810.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 520154421 is about 22806.8941550576. The cubic root of 520154421 is about 804.2247444156.

The spelling of 520154421 in words is "five hundred twenty million, one hundred fifty-four thousand, four hundred twenty-one".