1231430343 has 32 divisors (see below), whose sum is σ = 2042433792. Its totient is φ = 648384000.

The previous prime is 1231430339. The next prime is 1231430383. The reversal of 1231430343 is 3430341321.

It is not a de Polignac number, because 1231430343 - 2² = 1231430339 is a prime.

It is a super-2 number, since 2×1231430343² = 3032841379322195298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231430303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77133 + ... + 91718.

It is an arithmetic number, because the mean of its divisors is an integer number (63826056).

Almost surely, 2^1231430343 is an apocalyptic number.

1231430343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1231430343 is a deficient number, since it is larger than the sum of its proper divisors (811003449).

1231430343 is a wasteful number, since it uses less digits than its factorization.

1231430343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168895.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 1231430343 is about 35091.7418062997. The cubic root of 1231430343 is about 1071.8564281879.

Adding to 1231430343 its reverse (3430341321), we get a palindrome (4661771664).

The spelling of 1231430343 in words is "one billion, two hundred thirty-one million, four hundred thirty thousand, three hundred forty-three".