526221071 has 16 divisors (see below), whose sum is σ = 565346304. Its totient is φ = 488625984.

The previous prime is 526221061. The next prime is 526221089. The reversal of 526221071 is 170122625.

It is a de Polignac number, because none of the positive numbers 2^k-526221071 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 526221071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (526221041) 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, 135371 + ... + 139203.

It is an arithmetic number, because the mean of its divisors is an integer number (35334144).

Almost surely, 2^526221071 is an apocalyptic number.

526221071 is a deficient number, since it is larger than the sum of its proper divisors (39125233).

526221071 is a wasteful number, since it uses less digits than its factorization.

526221071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4030.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 526221071 is about 22939.5089528961. The cubic root of 526221071 is about 807.3392707922.

Adding to 526221071 its reverse (170122625), we get a palindrome (696343696).

The spelling of 526221071 in words is "five hundred twenty-six million, two hundred twenty-one thousand, seventy-one".