40875221 has 4 divisors (see below), whose sum is σ = 40897632. Its totient is φ = 40852812.

The previous prime is 40875217. The next prime is 40875223. The reversal of 40875221 is 12257804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40875221 - 2² = 40875217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40875223) 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, 8201 + ... + 12206.

It is an arithmetic number, because the mean of its divisors is an integer number (10224408).

Almost surely, 2^40875221 is an apocalyptic number.

It is an amenable number.

40875221 is a deficient number, since it is larger than the sum of its proper divisors (22411).

40875221 is a wasteful number, since it uses less digits than its factorization.

40875221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22410.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 40875221 is about 6393.3732098166. The cubic root of 40875221 is about 344.4715595450.

It can be divided in two parts, 40875 and 221, that multiplied together give a triangular number (9033375 = T₄₂₅₀).

The spelling of 40875221 in words is "forty million, eight hundred seventy-five thousand, two hundred twenty-one".