11071631 has 2 divisors, whose sum is σ = 11071632. Its totient is φ = 11071630.

The previous prime is 11071609. The next prime is 11071663. The reversal of 11071631 is 13617011.

11071631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (13617011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11071631 - 2¹⁰ = 11070607 is a prime.

It is a super-2 number, since 2×11071631² = 245162026000322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11071601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5535815 + 5535816.

It is an arithmetic number, because the mean of its divisors is an integer number (5535816).

Almost surely, 2^11071631 is an apocalyptic number.

11071631 is a deficient number, since it is larger than the sum of its proper divisors (1).

11071631 is an equidigital number, since it uses as much as digits as its factorization.

11071631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 11071631 is about 3327.4060467577. The cubic root of 11071631 is about 222.8797101728.

Adding to 11071631 its reverse (13617011), we get a palindrome (24688642).

The spelling of 11071631 in words is "eleven million, seventy-one thousand, six hundred thirty-one".