40221222400 has 120 divisors (see below), whose sum is σ = 103984643664. Its totient is φ = 15388876800.

The previous prime is 40221222359. The next prime is 40221222401. The reversal of 40221222400 is 422212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221222401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226090 + ... + 362710.

Almost surely, 2^40221222400 is an apocalyptic number.

40221222400 is a gapful number since it is divisible by the number (40) 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 40221222400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51992321832).

40221222400 is an abundant number, since it is smaller than the sum of its proper divisors (63763421264).

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

40221222400 is a wasteful number, since it uses less digits than its factorization.

40221222400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136672 (or 136651 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 40221222400 its reverse (422212204), we get a palindrome (40643434604).

The spelling of 40221222400 in words is "forty billion, two hundred twenty-one million, two hundred twenty-two thousand, four hundred".