10391953531 has 4 divisors (see below), whose sum is σ = 10400275000. Its totient is φ = 10383632064.

The previous prime is 10391953489. The next prime is 10391953573. The reversal of 10391953531 is 13535919301.

10391953531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13535919301 = 47 ⋅287998283.

It is an interprime number because it is at equal distance from previous prime (10391953489) and next prime (10391953573).

It is a cyclic number.

It is not a de Polignac number, because 10391953531 - 2¹¹ = 10391951483 is a prime.

It is a super-2 number, since 2×10391953531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10391953591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4158861 + ... + 4161358.

It is an arithmetic number, because the mean of its divisors is an integer number (2600068750).

Almost surely, 2^10391953531 is an apocalyptic number.

10391953531 is a deficient number, since it is larger than the sum of its proper divisors (8321469).

10391953531 is an equidigital number, since it uses as much as digits as its factorization.

10391953531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8321468.

The product of its (nonzero) digits is 54675, while the sum is 40.

The spelling of 10391953531 in words is "ten billion, three hundred ninety-one million, nine hundred fifty-three thousand, five hundred thirty-one".