40221580 has 24 divisors (see below), whose sum is σ = 96532128. Its totient is φ = 13790208.

The previous prime is 40221563. The next prime is 40221589. The reversal of 40221580 is 8512204.

It is not an unprimeable number, because it can be changed into a prime (40221589) 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, 143509 + ... + 143788.

It is an arithmetic number, because the mean of its divisors is an integer number (4022172).

Almost surely, 2^40221580 is an apocalyptic number.

It is an amenable number.

40221580 is an abundant number, since it is smaller than the sum of its proper divisors (56310548).

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

40221580 is a wasteful number, since it uses less digits than its factorization.

40221580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287313 (or 287311 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 40221580 is about 6342.0485649355. The cubic root of 40221580 is about 342.6255209739.

Adding to 40221580 its reverse (8512204), we get a palindrome (48733784).

The spelling of 40221580 in words is "forty million, two hundred twenty-one thousand, five hundred eighty".