40221155 has 12 divisors (see below), whose sum is σ = 52264800. Its totient is φ = 29701152.

The previous prime is 40221131. The next prime is 40221161. The reversal of 40221155 is 55112204.

It is not a de Polignac number, because 40221155 - 2¹² = 40217059 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22955 + ... + 24644.

It is an arithmetic number, because the mean of its divisors is an integer number (4355400).

Almost surely, 2^40221155 is an apocalyptic number.

40221155 is a deficient number, since it is larger than the sum of its proper divisors (12043645).

40221155 is a wasteful number, since it uses less digits than its factorization.

40221155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47630 (or 47617 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 40221155 is about 6342.0150583233. The cubic root of 40221155 is about 342.6243141892.

Adding to 40221155 its reverse (55112204), we get a palindrome (95333359).

The spelling of 40221155 in words is "forty million, two hundred twenty-one thousand, one hundred fifty-five".