10556391 has 8 divisors (see below), whose sum is σ = 14135040. Its totient is φ = 7007672.

The previous prime is 10556389. The next prime is 10556401. The reversal of 10556391 is 19365501.

10556391 is digitally balanced in base 2 and base 4, because in such bases 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 a cyclic number.

It is not a de Polignac number, because 10556391 - 2¹ = 10556389 is a prime.

It is a super-2 number, since 2×10556391² = 222874781889762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10556321) 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, 6645 + ... + 8078.

It is an arithmetic number, because the mean of its divisors is an integer number (1766880).

Almost surely, 2^10556391 is an apocalyptic number.

10556391 is a deficient number, since it is larger than the sum of its proper divisors (3578649).

10556391 is a wasteful number, since it uses less digits than its factorization.

10556391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14965.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 10556391 is about 3249.0600179129. The cubic root of 10556391 is about 219.3672659833.

The spelling of 10556391 in words is "ten million, five hundred fifty-six thousand, three hundred ninety-one".