71985051 has 16 divisors (see below), whose sum is σ = 106775200. Its totient is φ = 47931264.

The previous prime is 71985049. The next prime is 71985061. The reversal of 71985051 is 15058917.

It is not a de Polignac number, because 71985051 - 2¹ = 71985049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71984997 and 71985015.

It is not an unprimeable number, because it can be changed into a prime (71985061) 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, 42615 + ... + 44271.

It is an arithmetic number, because the mean of its divisors is an integer number (6673450).

Almost surely, 2^71985051 is an apocalyptic number.

71985051 is a deficient number, since it is larger than the sum of its proper divisors (34790149).

71985051 is a wasteful number, since it uses less digits than its factorization.

71985051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275 (or 3269 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 36.

The square root of 71985051 is about 8484.4004502381. The cubic root of 71985051 is about 415.9879707906.

The spelling of 71985051 in words is "seventy-one million, nine hundred eighty-five thousand, fifty-one".