41111981 has 4 divisors (see below), whose sum is σ = 41986752. Its totient is φ = 40237212.

The previous prime is 41111977. The next prime is 41111989. The reversal of 41111981 is 18911114.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 41111981 - 2² = 41111977 is a prime.

It is a super-2 number, since 2×41111981² = 3380389963488722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 41111981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41111989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437315 + ... + 437408.

It is an arithmetic number, because the mean of its divisors is an integer number (10496688).

Almost surely, 2^41111981 is an apocalyptic number.

It is an amenable number.

41111981 is a deficient number, since it is larger than the sum of its proper divisors (874771).

41111981 is an equidigital number, since it uses as much as digits as its factorization.

41111981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874770.

The product of its digits is 288, while the sum is 26.

The square root of 41111981 is about 6411.8625219198. The cubic root of 41111981 is about 345.1353694077.

The spelling of 41111981 in words is "forty-one million, one hundred eleven thousand, nine hundred eighty-one".