521143030 has 16 divisors (see below), whose sum is σ = 938401200. Its totient is φ = 208380832.

The previous prime is 521142997. The next prime is 521143031. The reversal of 521143030 is 30341125.

It is a junction number, because it is equal to n+sod(n) for n = 521142989 and 521143007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521143031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25092 + ... + 40888.

It is an arithmetic number, because the mean of its divisors is an integer number (58650075).

Almost surely, 2^521143030 is an apocalyptic number.

521143030 is a deficient number, since it is larger than the sum of its proper divisors (417258170).

521143030 is a wasteful number, since it uses less digits than its factorization.

521143030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19103.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 521143030 is about 22828.5573350573. The cubic root of 521143030 is about 804.7339269572.

Adding to 521143030 its reverse (30341125), we get a palindrome (551484155).

The spelling of 521143030 in words is "five hundred twenty-one million, one hundred forty-three thousand, thirty".