40852821 has 4 divisors (see below), whose sum is σ = 54470432. Its totient is φ = 27235212.

The previous prime is 40852817. The next prime is 40852829. The reversal of 40852821 is 12825804.

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 not a de Polignac number, because 40852821 - 2² = 40852817 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 (40852829) 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, 6808801 + ... + 6808806.

It is an arithmetic number, because the mean of its divisors is an integer number (13617608).

Almost surely, 2^40852821 is an apocalyptic number.

It is an amenable number.

40852821 is a deficient number, since it is larger than the sum of its proper divisors (13617611).

40852821 is a wasteful number, since it uses less digits than its factorization.

40852821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13617610.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 40852821 is about 6391.6211558571. The cubic root of 40852821 is about 344.4086235112.

The spelling of 40852821 in words is "forty million, eight hundred fifty-two thousand, eight hundred twenty-one".