10440191213 has 4 divisors (see below), whose sum is σ = 10445755260. Its totient is φ = 10434627168.

The previous prime is 10440191131. The next prime is 10440191219. The reversal of 10440191213 is 31219104401.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5703723529 + 4736467684 = 75523^2 + 68822^2 .

It is a cyclic number.

It is not a de Polignac number, because 10440191213 - 2¹⁶ = 10440125677 is a prime.

It is a super-2 number, since 2×10440191213² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10440191219) 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, 2779208 + ... + 2782961.

It is an arithmetic number, because the mean of its divisors is an integer number (2611438815).

Almost surely, 2^10440191213 is an apocalyptic number.

It is an amenable number.

10440191213 is a deficient number, since it is larger than the sum of its proper divisors (5564047).

10440191213 is an equidigital number, since it uses as much as digits as its factorization.

10440191213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5564046.

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 10440191213 its reverse (31219104401), we get a palindrome (41659295614).

The spelling of 10440191213 in words is "ten billion, four hundred forty million, one hundred ninety-one thousand, two hundred thirteen".