1220325535 has 48 divisors (see below), whose sum is σ = 1835604288. Its totient is φ = 770964480.

The previous prime is 1220325503. The next prime is 1220325541. The reversal of 1220325535 is 5355230221.

It is not a de Polignac number, because 1220325535 - 2⁵ = 1220325503 is a prime.

It is a super-3 number, since 3×1220325535³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129142 + ... + 138268.

It is an arithmetic number, because the mean of its divisors is an integer number (38241756).

Almost surely, 2^1220325535 is an apocalyptic number.

1220325535 is a deficient number, since it is larger than the sum of its proper divisors (615278753).

1220325535 is a wasteful number, since it uses less digits than its factorization.

1220325535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9184 (or 9173 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 1220325535 is about 34933.1581022959. The cubic root of 1220325535 is about 1068.6247609936.

Adding to 1220325535 its reverse (5355230221), we get a palindrome (6575555756).

The spelling of 1220325535 in words is "one billion, two hundred twenty million, three hundred twenty-five thousand, five hundred thirty-five".