71631253 has 2 divisors, whose sum is σ = 71631254. Its totient is φ = 71631252.

The previous prime is 71631239. The next prime is 71631271. The reversal of 71631253 is 35213617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60186564 + 11444689 = 7758^2 + 3383^2 .

It is a cyclic number.

It is not a de Polignac number, because 71631253 - 2¹³ = 71623061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71631233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35815626 + 35815627.

It is an arithmetic number, because the mean of its divisors is an integer number (35815627).

Almost surely, 2^71631253 is an apocalyptic number.

It is an amenable number.

71631253 is a deficient number, since it is larger than the sum of its proper divisors (1).

71631253 is an equidigital number, since it uses as much as digits as its factorization.

71631253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 28.

The square root of 71631253 is about 8463.5248567013. The cubic root of 71631253 is about 415.3053406813.

The spelling of 71631253 in words is "seventy-one million, six hundred thirty-one thousand, two hundred fifty-three".