40821573 has 32 divisors (see below), whose sum is σ = 64786176. Its totient is φ = 22606848.

The previous prime is 40821563. The next prime is 40821581. The reversal of 40821573 is 37512804.

It is not a de Polignac number, because 40821573 - 2¹⁴ = 40805189 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40821573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40821523) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13911 + ... + 16587.

It is an arithmetic number, because the mean of its divisors is an integer number (2024568).

Almost surely, 2^40821573 is an apocalyptic number.

It is an amenable number.

40821573 is a deficient number, since it is larger than the sum of its proper divisors (23964603).

40821573 is a wasteful number, since it uses less digits than its factorization.

40821573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 40821573 is about 6389.1762379825. The cubic root of 40821573 is about 344.3207893012.

The spelling of 40821573 in words is "forty million, eight hundred twenty-one thousand, five hundred seventy-three".