40030522465621 has 4 divisors (see below), whose sum is σ = 40042996922700. Its totient is φ = 40018048008544.

The previous prime is 40030522465567. The next prime is 40030522465667. The reversal of 40030522465621 is 12656422503004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29739418864996 + 10291103600625 = 5453386^2 + 3207975^2 .

It is a cyclic number.

It is not a de Polignac number, because 40030522465621 - 2²¹ = 40030520368469 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 (40030522462621) 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, 6237223726 + ... + 6237230143.

It is an arithmetic number, because the mean of its divisors is an integer number (10010749230675).

Almost surely, 2^{40030522465621} is an apocalyptic number.

It is an amenable number.

40030522465621 is a deficient number, since it is larger than the sum of its proper divisors (12474457079).

40030522465621 is a wasteful number, since it uses less digits than its factorization.

40030522465621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12474457078.

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 40030522465621 its reverse (12656422503004), we get a palindrome (52686944968625).

The spelling of 40030522465621 in words is "forty trillion, thirty billion, five hundred twenty-two million, four hundred sixty-five thousand, six hundred twenty-one".