40305322521 has 32 divisors (see below), whose sum is σ = 62634147840. Its totient is φ = 25567304400.

The previous prime is 40305322513. The next prime is 40305322531. The reversal of 40305322521 is 12522350304.

It is a happy number.

40305322521 is a `hidden beast` number, since 40 + 30 + 53 + 22 + 521 = 666.

It is not a de Polignac number, because 40305322521 - 2³ = 40305322513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40305322501) 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, 51295 + ... + 288516.

It is an arithmetic number, because the mean of its divisors is an integer number (1957317120).

Almost surely, 2^40305322521 is an apocalyptic number.

It is an amenable number.

40305322521 is a deficient number, since it is larger than the sum of its proper divisors (22328825319).

40305322521 is a wasteful number, since it uses less digits than its factorization.

40305322521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340034 (or 340028 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 40305322521 its reverse (12522350304), we get a palindrome (52827672825).

The spelling of 40305322521 in words is "forty billion, three hundred five million, three hundred twenty-two thousand, five hundred twenty-one".