40020555 has 16 divisors (see below), whose sum is σ = 67403520. Its totient is φ = 20220768.

The previous prime is 40020527. The next prime is 40020599. The reversal of 40020555 is 55502004.

It is not a de Polignac number, because 40020555 - 2⁵ = 40020523 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69927 + ... + 70496.

It is an arithmetic number, because the mean of its divisors is an integer number (4212720).

Almost surely, 2^40020555 is an apocalyptic number.

40020555 is a deficient number, since it is larger than the sum of its proper divisors (27382965).

40020555 is a wasteful number, since it uses less digits than its factorization.

40020555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140450.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 40020555 is about 6326.1801270593. The cubic root of 40020555 is about 342.0537602298.

Adding to 40020555 its reverse (55502004), we get a palindrome (95522559).

The spelling of 40020555 in words is "forty million, twenty thousand, five hundred fifty-five".