71241631 has 2 divisors, whose sum is σ = 71241632. Its totient is φ = 71241630.

The previous prime is 71241619. The next prime is 71241683. The reversal of 71241631 is 13614217.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71241631 - 2⁹ = 71241119 is a prime.

It is a super-2 number, since 2×71241631² = 10150739975080322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71241596 and 71241605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71245631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35620815 + 35620816.

It is an arithmetic number, because the mean of its divisors is an integer number (35620816).

Almost surely, 2^71241631 is an apocalyptic number.

71241631 is a deficient number, since it is larger than the sum of its proper divisors (1).

71241631 is an equidigital number, since it uses as much as digits as its factorization.

71241631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 25.

The square root of 71241631 is about 8440.4757567331. The cubic root of 71241631 is about 414.5509848170.

Adding to 71241631 its reverse (13614217), we get a palindrome (84855848).

The spelling of 71241631 in words is "seventy-one million, two hundred forty-one thousand, six hundred thirty-one".