43481961 has 8 divisors (see below), whose sum is σ = 64417760. Its totient is φ = 28987956.

The previous prime is 43481951. The next prime is 43481969. The reversal of 43481961 is 16918434.

It is not a de Polignac number, because 43481961 - 2⁶ = 43481897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43481969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805195 + ... + 805248.

It is an arithmetic number, because the mean of its divisors is an integer number (8052220).

Almost surely, 2^43481961 is an apocalyptic number.

It is an amenable number.

43481961 is a deficient number, since it is larger than the sum of its proper divisors (20935799).

43481961 is a wasteful number, since it uses less digits than its factorization.

43481961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610452 (or 1610446 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 43481961 is about 6594.0853042708. The cubic root of 43481961 is about 351.6438616669.

The spelling of 43481961 in words is "forty-three million, four hundred eighty-one thousand, nine hundred sixty-one".