71211051 has 12 divisors (see below), whose sum is σ = 105640912. Its totient is φ = 46190736.

The previous prime is 71211047. The next prime is 71211067. The reversal of 71211051 is 15011217.

It is a happy number.

It is not a de Polignac number, because 71211051 - 2² = 71211047 is a prime.

It is a super-3 number, since 3×71211051³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71211551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106591 + ... + 107256.

Almost surely, 2^71211051 is an apocalyptic number.

71211051 is a deficient number, since it is larger than the sum of its proper divisors (34429861).

71211051 is a wasteful number, since it uses less digits than its factorization.

71211051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213890 (or 213887 counting only the distinct ones).

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

The square root of 71211051 is about 8438.6640530359. The cubic root of 71211051 is about 414.4916619033.

Adding to 71211051 its reverse (15011217), we get a palindrome (86222268).

The spelling of 71211051 in words is "seventy-one million, two hundred eleven thousand, fifty-one".