71211357 has 36 divisors (see below), whose sum is σ = 120797820. Its totient is φ = 40303872.

The previous prime is 71211353. The next prime is 71211377. The reversal of 71211357 is 75311217.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2752281 + 68459076 = 1659^2 + 8274^2 .

It is not a de Polignac number, because 71211357 - 2² = 71211353 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71211357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71211353) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 49119 + ... + 50547.

It is an arithmetic number, because the mean of its divisors is an integer number (3355495).

Almost surely, 2^71211357 is an apocalyptic number.

It is an amenable number.

71211357 is a deficient number, since it is larger than the sum of its proper divisors (49586463).

71211357 is a wasteful number, since it uses less digits than its factorization.

71211357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562 (or 1552 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 71211357 is about 8438.6821838484. The cubic root of 71211357 is about 414.4922556045.

The spelling of 71211357 in words is "seventy-one million, two hundred eleven thousand, three hundred fifty-seven".