851029521 has 8 divisors (see below), whose sum is σ = 1135111680. Its totient is φ = 567150192.

The previous prime is 851029499. The next prime is 851029523. The reversal of 851029521 is 125920158.

851029521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 851029521 - 2⁶ = 851029457 is a prime.

It is a super-2 number, since 2×851029521² = 1448502491226978882, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (851029523) 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, 40630 + ... + 57903.

It is an arithmetic number, because the mean of its divisors is an integer number (141888960).

Almost surely, 2^851029521 is an apocalyptic number.

It is an amenable number.

851029521 is a deficient number, since it is larger than the sum of its proper divisors (284082159).

851029521 is a wasteful number, since it uses less digits than its factorization.

851029521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101415.

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 851029521 is about 29172.4102706650. The cubic root of 851029521 is about 947.6505270186.

Adding to 851029521 its reverse (125920158), we get a palindrome (976949679).

The spelling of 851029521 in words is "eight hundred fifty-one million, twenty-nine thousand, five hundred twenty-one".