40022145 has 48 divisors (see below), whose sum is σ = 71884800. Its totient is φ = 20587392.

The previous prime is 40022137. The next prime is 40022149. The reversal of 40022145 is 54122004.

40022145 is a `hidden beast` number, since 400 + 221 + 45 = 666.

It is not a de Polignac number, because 40022145 - 2³ = 40022137 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40022149) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 268531 + ... + 268679.

It is an arithmetic number, because the mean of its divisors is an integer number (1497600).

Almost surely, 2^40022145 is an apocalyptic number.

40022145 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40022145 is a deficient number, since it is larger than the sum of its proper divisors (31862655).

40022145 is a wasteful number, since it uses less digits than its factorization.

40022145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 40022145 is about 6326.3057940634. The cubic root of 40022145 is about 342.0582900543.

Adding to 40022145 its reverse (54122004), we get a palindrome (94144149).

The spelling of 40022145 in words is "forty million, twenty-two thousand, one hundred forty-five".