40158831 has 4 divisors (see below), whose sum is σ = 53545112. Its totient is φ = 26772552.

The previous prime is 40158827. The next prime is 40158841. The reversal of 40158831 is 13885104.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40158831 - 2² = 40158827 is a prime.

It is a super-2 number, since 2×40158831² = 3225463414573122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40158841) 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, 6693136 + ... + 6693141.

It is an arithmetic number, because the mean of its divisors is an integer number (13386278).

Almost surely, 2^40158831 is an apocalyptic number.

40158831 is a deficient number, since it is larger than the sum of its proper divisors (13386281).

40158831 is a wasteful number, since it uses less digits than its factorization.

40158831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13386280.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 40158831 is about 6337.0995731486. The cubic root of 40158831 is about 342.4472534966.

The spelling of 40158831 in words is "forty million, one hundred fifty-eight thousand, eight hundred thirty-one".