3943157081 has 8 divisors (see below), whose sum is σ = 4051315584. Its totient is φ = 3835082160.

The previous prime is 3943157051. The next prime is 3943157107. The reversal of 3943157081 is 1807513493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3943157081 is a prime.

It is a super-2 number, since 2×3943157081² = 31096975530880881122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3943157041) 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, 81536 + ... + 120558.

It is an arithmetic number, because the mean of its divisors is an integer number (506414448).

Almost surely, 2^3943157081 is an apocalyptic number.

It is an amenable number.

3943157081 is a deficient number, since it is larger than the sum of its proper divisors (108158503).

3943157081 is a wasteful number, since it uses less digits than its factorization.

3943157081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41791.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 3943157081 is about 62794.5625114150. The cubic root of 3943157081 is about 1579.8457736820.

The spelling of 3943157081 in words is "three billion, nine hundred forty-three million, one hundred fifty-seven thousand, eighty-one".