1355020433 has 4 divisors (see below), whose sum is σ = 1459252788. Its totient is φ = 1250788080.

The previous prime is 1355020423. The next prime is 1355020483. The reversal of 1355020433 is 3340205531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3340205531 = 13 ⋅256938887.

It can be written as a sum of positive squares in 2 ways, for example, as 775511104 + 579509329 = 27848^2 + 24073^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355020433 - 2⁴ = 1355020417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355020423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52116158 + ... + 52116183.

It is an arithmetic number, because the mean of its divisors is an integer number (364813197).

Almost surely, 2^1355020433 is an apocalyptic number.

1355020433 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1355020433 is a deficient number, since it is larger than the sum of its proper divisors (104232355).

1355020433 is a wasteful number, since it uses less digits than its factorization.

1355020433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104232354.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 1355020433 is about 36810.6021819801. The cubic root of 1355020433 is about 1106.5777868794.

Adding to 1355020433 its reverse (3340205531), we get a palindrome (4695225964).

The spelling of 1355020433 in words is "one billion, three hundred fifty-five million, twenty thousand, four hundred thirty-three".