43642240156221 has 32 divisors (see below), whose sum is σ = 67962102067200. Its totient is φ = 24396849846720.

The previous prime is 43642240156211. The next prime is 43642240156231. The reversal of 43642240156221 is 12265104224634.

It is an interprime number because it is at equal distance from previous prime (43642240156211) and next prime (43642240156231).

It is not a de Polignac number, because 43642240156221 - 2¹⁰ = 43642240155197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43642240156211) 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, 120490515 + ... + 120852176.

It is an arithmetic number, because the mean of its divisors is an integer number (2123815689600).

Almost surely, 2^{43642240156221} is an apocalyptic number.

It is an amenable number.

43642240156221 is a deficient number, since it is larger than the sum of its proper divisors (24319861910979).

43642240156221 is a wasteful number, since it uses less digits than its factorization.

43642240156221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241342889.

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 43642240156221 in words is "forty-three trillion, six hundred forty-two billion, two hundred forty million, one hundred fifty-six thousand, two hundred twenty-one".