43881157 has 2 divisors, whose sum is σ = 43881158. Its totient is φ = 43881156.

The previous prime is 43881137. The next prime is 43881169. The reversal of 43881157 is 75118834.

43881157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43744996 + 136161 = 6614^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 43881157 - 2¹⁹ = 43356869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43881137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21940578 + 21940579.

It is an arithmetic number, because the mean of its divisors is an integer number (21940579).

Almost surely, 2^43881157 is an apocalyptic number.

It is an amenable number.

43881157 is a deficient number, since it is larger than the sum of its proper divisors (1).

43881157 is an equidigital number, since it uses as much as digits as its factorization.

43881157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 43881157 is about 6624.2853954219. The cubic root of 43881157 is about 352.7167005832.

The spelling of 43881157 in words is "forty-three million, eight hundred eighty-one thousand, one hundred fifty-seven".