40213518 has 16 divisors (see below), whose sum is σ = 81746256. Its totient is φ = 13184640.

The previous prime is 40213513. The next prime is 40213531. The reversal of 40213518 is 81531204.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40213513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54571 + ... + 55302.

It is an arithmetic number, because the mean of its divisors is an integer number (5109141).

Almost surely, 2^40213518 is an apocalyptic number.

40213518 is an abundant number, since it is smaller than the sum of its proper divisors (41532738).

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

40213518 is a wasteful number, since it uses less digits than its factorization.

40213518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109939.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 40213518 is about 6341.4129340392. The cubic root of 40213518 is about 342.6026275294.

The spelling of 40213518 in words is "forty million, two hundred thirteen thousand, five hundred eighteen".