10981231 has 2 divisors, whose sum is σ = 10981232. Its totient is φ = 10981230.

The previous prime is 10981219. The next prime is 10981247. The reversal of 10981231 is 13218901.

It is a weak prime.

It is an emirp because it is prime and its reverse (13218901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10981231 - 2⁹ = 10980719 is a prime.

It is a super-2 number, since 2×10981231² = 241174868550722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10981196 and 10981205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10981331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5490615 + 5490616.

It is an arithmetic number, because the mean of its divisors is an integer number (5490616).

Almost surely, 2^10981231 is an apocalyptic number.

10981231 is a deficient number, since it is larger than the sum of its proper divisors (1).

10981231 is an equidigital number, since it uses as much as digits as its factorization.

10981231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 10981231 is about 3313.7940491225. The cubic root of 10981231 is about 222.2714464937.

Subtracting 10981231 from its reverse (13218901), we obtain a triangular number (2237670 = T₂₁₁₅).

The spelling of 10981231 in words is "ten million, nine hundred eighty-one thousand, two hundred thirty-one".