1355223357 has 12 divisors (see below), whose sum is σ = 2072694780. Its totient is φ = 850336128.

The previous prime is 1355223349. The next prime is 1355223361. The reversal of 1355223357 is 7533225531.

It can be written as a sum of positive squares in 2 ways, for example, as 1097331876 + 257891481 = 33126^2 + 16059^2 .

It is not a de Polignac number, because 1355223357 - 2³ = 1355223349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355223347) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4428682 + ... + 4428987.

It is an arithmetic number, because the mean of its divisors is an integer number (172724565).

Almost surely, 2^1355223357 is an apocalyptic number.

1355223357 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1355223357 is a deficient number, since it is larger than the sum of its proper divisors (717471423).

1355223357 is a wasteful number, since it uses less digits than its factorization.

1355223357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8857692 (or 8857689 counting only the distinct ones).

The product of its digits is 94500, while the sum is 36.

The square root of 1355223357 is about 36813.3584042532. The cubic root of 1355223357 is about 1106.6330234345.

Adding to 1355223357 its reverse (7533225531), we get a palindrome (8888448888).

The spelling of 1355223357 in words is "one billion, three hundred fifty-five million, two hundred twenty-three thousand, three hundred fifty-seven".