71224631 has 2 divisors, whose sum is σ = 71224632. Its totient is φ = 71224630.

The previous prime is 71224589. The next prime is 71224649. The reversal of 71224631 is 13642217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71224631 - 2¹⁸ = 70962487 is a prime.

It is a super-2 number, since 2×71224631² = 10145896122172322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71224631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71224651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35612315 + 35612316.

It is an arithmetic number, because the mean of its divisors is an integer number (35612316).

Almost surely, 2^71224631 is an apocalyptic number.

71224631 is a deficient number, since it is larger than the sum of its proper divisors (1).

71224631 is an equidigital number, since it uses as much as digits as its factorization.

71224631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 26.

The square root of 71224631 is about 8439.4686444112. The cubic root of 71224631 is about 414.5180081839.

Adding to 71224631 its reverse (13642217), we get a palindrome (84866848).

The spelling of 71224631 in words is "seventy-one million, two hundred twenty-four thousand, six hundred thirty-one".