40212113 has 4 divisors (see below), whose sum is σ = 42328560. Its totient is φ = 38095668.

The previous prime is 40212101. The next prime is 40212121. The reversal of 40212113 is 31121204.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40212113 - 2¹² = 40208017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40212143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1058195 + ... + 1058232.

It is an arithmetic number, because the mean of its divisors is an integer number (10582140).

Almost surely, 2^40212113 is an apocalyptic number.

It is an amenable number.

40212113 is a deficient number, since it is larger than the sum of its proper divisors (2116447).

40212113 is a wasteful number, since it uses less digits than its factorization.

40212113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2116446.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 40212113 is about 6341.3021533436. The cubic root of 40212113 is about 342.5986374756.

Adding to 40212113 its reverse (31121204), we get a palindrome (71333317).

Subtracting from 40212113 its reverse (31121204), we obtain a palindrome (9090909).

The spelling of 40212113 in words is "forty million, two hundred twelve thousand, one hundred thirteen".