40531605 has 8 divisors (see below), whose sum is σ = 64850592. Its totient is φ = 21616848.

The previous prime is 40531597. The next prime is 40531607. The reversal of 40531605 is 50613504.

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

It is not a de Polignac number, because 40531605 - 2³ = 40531597 is a prime.

It is a super-2 number, since 2×40531605² = 3285622007752050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40531607) 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, 1351039 + ... + 1351068.

It is an arithmetic number, because the mean of its divisors is an integer number (8106324).

Almost surely, 2^40531605 is an apocalyptic number.

It is an amenable number.

40531605 is a deficient number, since it is larger than the sum of its proper divisors (24318987).

40531605 is a wasteful number, since it uses less digits than its factorization.

40531605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2702115.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 40531605 is about 6366.4436697422. The cubic root of 40531605 is about 343.5035796470.

The spelling of 40531605 in words is "forty million, five hundred thirty-one thousand, six hundred five".