40102013 has 4 divisors (see below), whose sum is σ = 45830880. Its totient is φ = 34373148.

The previous prime is 40102001. The next prime is 40102033. The reversal of 40102013 is 31020104.

It is a happy number.

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 40102013 - 2¹⁸ = 39839869 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40101985 and 40102003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40102033) 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, 2864423 + ... + 2864436.

It is an arithmetic number, because the mean of its divisors is an integer number (11457720).

Almost surely, 2^40102013 is an apocalyptic number.

It is an amenable number.

40102013 is a deficient number, since it is larger than the sum of its proper divisors (5728867).

40102013 is an equidigital number, since it uses as much as digits as its factorization.

40102013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5728866.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 40102013 is about 6332.6150206688. The cubic root of 40102013 is about 342.2856754908.

Adding to 40102013 its reverse (31020104), we get a palindrome (71122117).

The spelling of 40102013 in words is "forty million, one hundred two thousand, thirteen".