40350021 has 16 divisors (see below), whose sum is σ = 54609984. Its totient is φ = 26498304.

The previous prime is 40349999. The next prime is 40350043. The reversal of 40350021 is 12005304.

40350021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40349999) and next prime (40350043).

It is not a de Polignac number, because 40350021 - 2⁵ = 40349989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40350071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107991 + ... + 108363.

It is an arithmetic number, because the mean of its divisors is an integer number (3413124).

Almost surely, 2^40350021 is an apocalyptic number.

It is an amenable number.

40350021 is a deficient number, since it is larger than the sum of its proper divisors (14259963).

40350021 is a wasteful number, since it uses less digits than its factorization.

40350021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 40350021 is about 6352.1666382424. The cubic root of 40350021 is about 342.9898395333.

Adding to 40350021 its reverse (12005304), we get a palindrome (52355325).

The spelling of 40350021 in words is "forty million, three hundred fifty thousand, twenty-one".