1355221511 has 8 divisors (see below), whose sum is σ = 1549722144. Its totient is φ = 1160945280.

The previous prime is 1355221499. The next prime is 1355221519. The reversal of 1355221511 is 1151225531.

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

It is a cyclic number.

It is not a de Polignac number, because 1355221511 - 2¹⁰ = 1355220487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355221519) 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, 42950 + ... + 67491.

It is an arithmetic number, because the mean of its divisors is an integer number (193715268).

Almost surely, 2^1355221511 is an apocalyptic number.

1355221511 is a deficient number, since it is larger than the sum of its proper divisors (194500633).

1355221511 is a wasteful number, since it uses less digits than its factorization.

1355221511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112201.

The product of its digits is 1500, while the sum is 26.

The square root of 1355221511 is about 36813.3333318242. Note that the first 5 decimals coincide. The cubic root of 1355221511 is about 1106.6325209723.

The spelling of 1355221511 in words is "one billion, three hundred fifty-five million, two hundred twenty-one thousand, five hundred eleven".