43312123403 has 2 divisors, whose sum is σ = 43312123404. Its totient is φ = 43312123402.

The previous prime is 43312123399. The next prime is 43312123429. The reversal of 43312123403 is 30432121334.

It is an a-pointer prime, because the next prime (43312123429) can be obtained adding 43312123403 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43312123403 - 2² = 43312123399 is a prime.

It is not a weakly prime, because it can be changed into another prime (43312123103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21656061701 + 21656061702.

It is an arithmetic number, because the mean of its divisors is an integer number (21656061702).

Almost surely, 2^43312123403 is an apocalyptic number.

43312123403 is a deficient number, since it is larger than the sum of its proper divisors (1).

43312123403 is an equidigital number, since it uses as much as digits as its factorization.

43312123403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 43312123403 its reverse (30432121334), we get a palindrome (73744244737).

The spelling of 43312123403 in words is "forty-three billion, three hundred twelve million, one hundred twenty-three thousand, four hundred three".