10811531 has 2 divisors, whose sum is σ = 10811532. Its totient is φ = 10811530.

The previous prime is 10811503. The next prime is 10811539. The reversal of 10811531 is 13511801.

10811531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (13511801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10811531 - 2¹⁰ = 10810507 is a prime.

It is a super-2 number, since 2×10811531² = 233778405127922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10811539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5405765 + 5405766.

It is an arithmetic number, because the mean of its divisors is an integer number (5405766).

Almost surely, 2^10811531 is an apocalyptic number.

10811531 is a deficient number, since it is larger than the sum of its proper divisors (1).

10811531 is an equidigital number, since it uses as much as digits as its factorization.

10811531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 20.

The square root of 10811531 is about 3288.0892627786. The cubic root of 10811531 is about 221.1205296546.

The spelling of 10811531 in words is "ten million, eight hundred eleven thousand, five hundred thirty-one".