40231221144 has 32 divisors (see below), whose sum is σ = 104951013120. Its totient is φ = 12827345696.

The previous prime is 40231221133. The next prime is 40231221169. The reversal of 40231221144 is 44112213204.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36440772 + ... + 36441875.

It is an arithmetic number, because the mean of its divisors is an integer number (3279719160).

Almost surely, 2^40231221144 is an apocalyptic number.

It is an amenable number.

40231221144 is an abundant number, since it is smaller than the sum of its proper divisors (64719791976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40231221144 is a wasteful number, since it uses less digits than its factorization.

40231221144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72882679 (or 72882675 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 40231221144 its reverse (44112213204), we get a palindrome (84343434348).

The spelling of 40231221144 in words is "forty billion, two hundred thirty-one million, two hundred twenty-one thousand, one hundred forty-four".