1355331811 has 8 divisors (see below), whose sum is σ = 1419935744. Its totient is φ = 1292033160.

The previous prime is 1355331799. The next prime is 1355331823. The reversal of 1355331811 is 1181335531.

It is an interprime number because it is at equal distance from previous prime (1355331799) and next prime (1355331823).

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 1355331811 - 2¹⁹ = 1354807523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355331011) 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, 324195 + ... + 328348.

It is an arithmetic number, because the mean of its divisors is an integer number (177491968).

Almost surely, 2^1355331811 is an apocalyptic number.

1355331811 is a deficient number, since it is larger than the sum of its proper divisors (64603933).

1355331811 is an equidigital number, since it uses as much as digits as its factorization.

1355331811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652641.

The product of its digits is 5400, while the sum is 31.

The square root of 1355331811 is about 36814.8313998584. The cubic root of 1355331811 is about 1106.6625426956.

The spelling of 1355331811 in words is "one billion, three hundred fifty-five million, three hundred thirty-one thousand, eight hundred eleven".