355143231 has 16 divisors (see below), whose sum is σ = 553830400. Its totient is φ = 224300664.

The previous prime is 355143221. The next prime is 355143241. The reversal of 355143231 is 132341553.

It is an interprime number because it is at equal distance from previous prime (355143221) and next prime (355143241).

It is not a de Polignac number, because 355143231 - 2⁵ = 355143199 is a prime.

It is a super-2 number, since 2×355143231² = 252253429050238722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 355143195 and 355143204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355143211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345631 + ... + 346656.

It is an arithmetic number, because the mean of its divisors is an integer number (34614400).

Almost surely, 2^355143231 is an apocalyptic number.

355143231 is a deficient number, since it is larger than the sum of its proper divisors (198687169).

355143231 is a wasteful number, since it uses less digits than its factorization.

355143231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692315 (or 692309 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 355143231 is about 18845.2442541878. The cubic root of 355143231 is about 708.1650900566.

Adding to 355143231 its reverse (132341553), we get a palindrome (487484784).

The spelling of 355143231 in words is "three hundred fifty-five million, one hundred forty-three thousand, two hundred thirty-one".