10531391 has 8 divisors (see below), whose sum is σ = 11369904. Its totient is φ = 9696960.

The previous prime is 10531373. The next prime is 10531429. The reversal of 10531391 is 19313501.

10531391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10531391 - 2¹⁰ = 10530367 is a prime.

It is a super-2 number, since 2×10531391² = 221820392789762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10531361) 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, 6371 + ... + 7851.

It is an arithmetic number, because the mean of its divisors is an integer number (1421238).

Almost surely, 2^10531391 is an apocalyptic number.

10531391 is a deficient number, since it is larger than the sum of its proper divisors (838513).

10531391 is a wasteful number, since it uses less digits than its factorization.

10531391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041.

The product of its (nonzero) digits is 405, while the sum is 23.

The square root of 10531391 is about 3245.2104708324. The cubic root of 10531391 is about 219.1939581224.

Adding to 10531391 its reverse (19313501), we get a palindrome (29844892).

The spelling of 10531391 in words is "ten million, five hundred thirty-one thousand, three hundred ninety-one".