385520035521 has 16 divisors (see below), whose sum is σ = 521216129984. Its totient is φ = 253420648704.

The previous prime is 385520035517. The next prime is 385520035529. The reversal of 385520035521 is 125530025583.

It is not a de Polignac number, because 385520035521 - 2² = 385520035517 is a prime.

It is a super-2 number, since 2×385520035521² (a number of 24 digits) contains 22 as substring.

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 385520035521.

It is not an unprimeable number, because it can be changed into a prime (385520035529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 528645 + ... + 1024941.

It is an arithmetic number, because the mean of its divisors is an integer number (32576008124).

Almost surely, 2^385520035521 is an apocalyptic number.

It is an amenable number.

385520035521 is a deficient number, since it is larger than the sum of its proper divisors (135696094463).

385520035521 is a wasteful number, since it uses less digits than its factorization.

385520035521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499920.

The product of its (nonzero) digits is 180000, while the sum is 39.

The spelling of 385520035521 in words is "three hundred eighty-five billion, five hundred twenty million, thirty-five thousand, five hundred twenty-one".