40191331 has 8 divisors (see below), whose sum is σ = 41646960. Its totient is φ = 38761632.

The previous prime is 40191323. The next prime is 40191343. The reversal of 40191331 is 13319104.

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

It is a cyclic number.

It is not a de Polignac number, because 40191331 - 2³ = 40191323 is a prime.

It is a super-2 number, since 2×40191331² = 3230686175103122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40191301) 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, 3300 + ... + 9553.

It is an arithmetic number, because the mean of its divisors is an integer number (5205870).

Almost surely, 2^40191331 is an apocalyptic number.

40191331 is a deficient number, since it is larger than the sum of its proper divisors (1455629).

40191331 is a wasteful number, since it uses less digits than its factorization.

40191331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12965.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 40191331 is about 6339.6633191361. The cubic root of 40191331 is about 342.5396079010.

The spelling of 40191331 in words is "forty million, one hundred ninety-one thousand, three hundred thirty-one".