71331011 has 2 divisors, whose sum is σ = 71331012. Its totient is φ = 71331010.

The previous prime is 71330983. The next prime is 71331037. The reversal of 71331011 is 11013317.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71331011 - 2¹⁰ = 71329987 is a prime.

It is a super-2 number, since 2×71331011² = 10176226260564242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71331511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35665505 + 35665506.

It is an arithmetic number, because the mean of its divisors is an integer number (35665506).

Almost surely, 2^71331011 is an apocalyptic number.

71331011 is a deficient number, since it is larger than the sum of its proper divisors (1).

71331011 is an equidigital number, since it uses as much as digits as its factorization.

71331011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63, while the sum is 17.

The square root of 71331011 is about 8445.7688223157. The cubic root of 71331011 is about 414.7242780720.

Adding to 71331011 its reverse (11013317), we get a palindrome (82344328).

The spelling of 71331011 in words is "seventy-one million, three hundred thirty-one thousand, eleven".