40021220525 has 24 divisors (see below), whose sum is σ = 58302247584. Its totient is φ = 26867390400.

The previous prime is 40021220507. The next prime is 40021220527. The reversal of 40021220525 is 52502212004.

It is not a de Polignac number, because 40021220525 - 2⁶ = 40021220461 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40021220525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40021220527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5593799 + ... + 5600948.

It is an arithmetic number, because the mean of its divisors is an integer number (2429260316).

Almost surely, 2^40021220525 is an apocalyptic number.

It is an amenable number.

40021220525 is a deficient number, since it is larger than the sum of its proper divisors (18281027059).

40021220525 is a wasteful number, since it uses less digits than its factorization.

40021220525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11194781 (or 11194776 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

Adding to 40021220525 its reverse (52502212004), we get a palindrome (92523432529).

The spelling of 40021220525 in words is "forty billion, twenty-one million, two hundred twenty thousand, five hundred twenty-five".