40221215144 has 64 divisors (see below), whose sum is σ = 87746405760. Its totient is φ = 17081251840.

The previous prime is 40221215131. The next prime is 40221215147. The reversal of 40221215144 is 44151212204.

40221215144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40221215144² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40221215147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106829 + ... + 303075.

It is an arithmetic number, because the mean of its divisors is an integer number (1371037590).

Almost surely, 2^40221215144 is an apocalyptic number.

40221215144 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40221215144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43873202880).

40221215144 is an abundant number, since it is smaller than the sum of its proper divisors (47525190616).

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

40221215144 is a wasteful number, since it uses less digits than its factorization.

40221215144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196418 (or 196414 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

Adding to 40221215144 its reverse (44151212204), we get a palindrome (84372427348).

The spelling of 40221215144 in words is "forty billion, two hundred twenty-one million, two hundred fifteen thousand, one hundred forty-four".