520321953 has 8 divisors (see below), whose sum is σ = 693930208. Its totient is φ = 346797504.

The previous prime is 520321951. The next prime is 520321979. The reversal of 520321953 is 359123025.

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

It is not a de Polignac number, because 520321953 - 2¹ = 520321951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520321953.

It is not an unprimeable number, because it can be changed into a prime (520321951) 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, 4651 + ... + 32592.

It is an arithmetic number, because the mean of its divisors is an integer number (86741276).

Almost surely, 2^520321953 is an apocalyptic number.

It is an amenable number.

520321953 is a deficient number, since it is larger than the sum of its proper divisors (173608255).

520321953 is a wasteful number, since it uses less digits than its factorization.

520321953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41903.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 520321953 is about 22810.5666961608. The cubic root of 520321953 is about 804.3110770583.

Adding to 520321953 its reverse (359123025), we get a palindrome (879444978).

The spelling of 520321953 in words is "five hundred twenty million, three hundred twenty-one thousand, nine hundred fifty-three".