40042025221 has 4 divisors (see below), whose sum is σ = 43682209344. Its totient is φ = 36401841100.

The previous prime is 40042025213. The next prime is 40042025251. The reversal of 40042025221 is 12252024004.

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 a cyclic number.

It is not a de Polignac number, because 40042025221 - 2³ = 40042025213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40042025192 and 40042025201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40042025251) 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, 1820092045 + ... + 1820092066.

It is an arithmetic number, because the mean of its divisors is an integer number (10920552336).

Almost surely, 2^40042025221 is an apocalyptic number.

It is an amenable number.

40042025221 is a deficient number, since it is larger than the sum of its proper divisors (3640184123).

40042025221 is a wasteful number, since it uses less digits than its factorization.

40042025221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3640184122.

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 40042025221 its reverse (12252024004), we get a palindrome (52294049225).

The spelling of 40042025221 in words is "forty billion, forty-two million, twenty-five thousand, two hundred twenty-one".