10811971 has 4 divisors (see below), whose sum is σ = 10844392. Its totient is φ = 10779552.

The previous prime is 10811923. The next prime is 10811989. The reversal of 10811971 is 17911801.

10811971 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: 17911801 = 1367 ⋅13103.

It is a cyclic number.

It is not a de Polignac number, because 10811971 - 2⁹ = 10811459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10811921) 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, 15705 + ... + 16378.

It is an arithmetic number, because the mean of its divisors is an integer number (2711098).

Almost surely, 2^10811971 is an apocalyptic number.

10811971 is a deficient number, since it is larger than the sum of its proper divisors (32421).

10811971 is an equidigital number, since it uses as much as digits as its factorization.

10811971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32420.

The product of its (nonzero) digits is 504, while the sum is 28.

The square root of 10811971 is about 3288.1561702571. The cubic root of 10811971 is about 221.1235292826.

The spelling of 10811971 in words is "ten million, eight hundred eleven thousand, nine hundred seventy-one".