56405543 has 2 divisors, whose sum is σ = 56405544. Its totient is φ = 56405542.

The previous prime is 56405537. The next prime is 56405549. The reversal of 56405543 is 34550465.

It is a balanced prime because it is at equal distance from previous prime (56405537) and next prime (56405549).

It is a cyclic number.

It is not a de Polignac number, because 56405543 - 2⁴ = 56405527 is a prime.

It is a super-2 number, since 2×56405543² = 6363170562249698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56405549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28202771 + 28202772.

It is an arithmetic number, because the mean of its divisors is an integer number (28202772).

Almost surely, 2^56405543 is an apocalyptic number.

56405543 is a deficient number, since it is larger than the sum of its proper divisors (1).

56405543 is an equidigital number, since it uses as much as digits as its factorization.

56405543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 56405543 is about 7510.3623747460. The cubic root of 56405543 is about 383.5075587776.

The spelling of 56405543 in words is "fifty-six million, four hundred five thousand, five hundred forty-three".