40221342 has 48 divisors (see below), whose sum is σ = 103933440. Its totient is φ = 10991376.

The previous prime is 40221301. The next prime is 40221343. The reversal of 40221342 is 24312204.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40221343) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4042 + ... + 9837.

It is an arithmetic number, because the mean of its divisors is an integer number (2165280).

Almost surely, 2^40221342 is an apocalyptic number.

40221342 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

40221342 is an abundant number, since it is smaller than the sum of its proper divisors (63712098).

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

40221342 is a wasteful number, since it uses less digits than its factorization.

40221342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13917 (or 13914 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40221342 is about 6342.0298012545. The cubic root of 40221342 is about 342.6248451755.

Adding to 40221342 its reverse (24312204), we get a palindrome (64533546).

The spelling of 40221342 in words is "forty million, two hundred twenty-one thousand, three hundred forty-two".