43551457 has 2 divisors, whose sum is σ = 43551458. Its totient is φ = 43551456.

The previous prime is 43551437. The next prime is 43551491. The reversal of 43551457 is 75415534.

It is an a-pointer prime, because the next prime (43551491) can be obtained adding 43551457 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34058896 + 9492561 = 5836^2 + 3081^2 .

It is a cyclic number.

It is not a de Polignac number, because 43551457 - 2¹⁵ = 43518689 is a prime.

It is not a weakly prime, because it can be changed into another prime (43551427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21775728 + 21775729.

It is an arithmetic number, because the mean of its divisors is an integer number (21775729).

Almost surely, 2^43551457 is an apocalyptic number.

It is an amenable number.

43551457 is a deficient number, since it is larger than the sum of its proper divisors (1).

43551457 is an equidigital number, since it uses as much as digits as its factorization.

43551457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42000, while the sum is 34.

The square root of 43551457 is about 6599.3527712951. The cubic root of 43551457 is about 351.8311027922.

The spelling of 43551457 in words is "forty-three million, five hundred fifty-one thousand, four hundred fifty-seven".