1355405231 has 8 divisors (see below), whose sum is σ = 1360301904. Its totient is φ = 1350518400.

The previous prime is 1355405221. The next prime is 1355405237. The reversal of 1355405231 is 1325045531.

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 1355405231 - 2³⁰ = 281663407 is a prime.

It is a super-2 number, since 2×1355405231² = 3674246680444326722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1355405194 and 1355405203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355405237) 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, 364775 + ... + 368471.

It is an arithmetic number, because the mean of its divisors is an integer number (170037738).

Almost surely, 2^1355405231 is an apocalyptic number.

1355405231 is a deficient number, since it is larger than the sum of its proper divisors (4896673).

1355405231 is an equidigital number, since it uses as much as digits as its factorization.

1355405231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4921.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 1355405231 is about 36815.8285388228. The cubic root of 1355405231 is about 1106.6825254276.

The spelling of 1355405231 in words is "one billion, three hundred fifty-five million, four hundred five thousand, two hundred thirty-one".