71021151 has 16 divisors (see below), whose sum is σ = 105532000. Its totient is φ = 47205504.

The previous prime is 71021131. The next prime is 71021161. The reversal of 71021151 is 15112017.

It is a happy number.

It is not a de Polignac number, because 71021151 - 2¹⁰ = 71020127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71021131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5655 + ... + 13191.

It is an arithmetic number, because the mean of its divisors is an integer number (6595750).

Almost surely, 2^71021151 is an apocalyptic number.

71021151 is a deficient number, since it is larger than the sum of its proper divisors (34510849).

71021151 is a wasteful number, since it uses less digits than its factorization.

71021151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7895 (or 7889 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 71021151 is about 8427.4047606603. The cubic root of 71021151 is about 414.1228893745.

Adding to 71021151 its reverse (15112017), we get a palindrome (86133168).

The spelling of 71021151 in words is "seventy-one million, twenty-one thousand, one hundred fifty-one".