40531216 has 20 divisors (see below), whose sum is σ = 85668624. Its totient is φ = 18423200.

The previous prime is 40531207. The next prime is 40531217. The reversal of 40531216 is 61213504.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (40531217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114970 + ... + 115321.

Almost surely, 2^40531216 is an apocalyptic number.

It is an amenable number.

40531216 is an abundant number, since it is smaller than the sum of its proper divisors (45137408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40531216 is a wasteful number, since it uses less digits than its factorization.

40531216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230310 (or 230304 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 40531216 is about 6366.4131188606. The cubic root of 40531216 is about 343.5024807241.

The spelling of 40531216 in words is "forty million, five hundred thirty-one thousand, two hundred sixteen".