1356543231 has 8 divisors (see below), whose sum is σ = 1850787840. Its totient is φ = 883330392.

The previous prime is 1356543211. The next prime is 1356543239. The reversal of 1356543231 is 1323456531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1356543231 - 2⁷ = 1356543103 is a prime.

It is a super-2 number, since 2×1356543231² = 3680419075143838722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1356543192 and 1356543201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356543239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5257791 + ... + 5258048.

It is an arithmetic number, because the mean of its divisors is an integer number (231348480).

Almost surely, 2^1356543231 is an apocalyptic number.

1356543231 is a deficient number, since it is larger than the sum of its proper divisors (494244609).

1356543231 is a wasteful number, since it uses less digits than its factorization.

1356543231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10515885.

The product of its digits is 32400, while the sum is 33.

The square root of 1356543231 is about 36831.2806049423. The cubic root of 1356543231 is about 1106.9921628171.

Adding to 1356543231 its reverse (1323456531), we get a palindrome (2679999762).

The spelling of 1356543231 in words is "one billion, three hundred fifty-six million, five hundred forty-three thousand, two hundred thirty-one".