3521226636 has 36 divisors (see below), whose sum is σ = 9188006464. Its totient is φ = 1135879200.

The previous prime is 3521226629. The next prime is 3521226649. The reversal of 3521226636 is 6366221253.

3521226636 is a `hidden beast` number, since 3 + 5 + 2 + 12 + 2 + 6 + 636 = 666.

3521226636 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 3521226636.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1576495 + ... + 1578726.

Almost surely, 2^3521226636 is an apocalyptic number.

3521226636 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3521226636 is an abundant number, since it is smaller than the sum of its proper divisors (5666779828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3521226636 is a wasteful number, since it uses less digits than its factorization.

3521226636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3155262 (or 3155257 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 3521226636 is about 59339.9244691127. The cubic root of 3521226636 is about 1521.3576622075.

Adding to 3521226636 its reverse (6366221253), we get a palindrome (9887447889).

The spelling of 3521226636 in words is "three billion, five hundred twenty-one million, two hundred twenty-six thousand, six hundred thirty-six".