71955213 has 16 divisors (see below), whose sum is σ = 104867136. Its totient is φ = 43523840.

The previous prime is 71955197. The next prime is 71955217. The reversal of 71955213 is 31255917.

It is a cyclic number.

It is not a de Polignac number, because 71955213 - 2⁴ = 71955197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71955217) 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 15 ways as a sum of consecutive naturals, for example, 17731 + ... + 21407.

It is an arithmetic number, because the mean of its divisors is an integer number (6554196).

Almost surely, 2^71955213 is an apocalyptic number.

It is an amenable number.

71955213 is a deficient number, since it is larger than the sum of its proper divisors (32911923).

71955213 is a wasteful number, since it uses less digits than its factorization.

71955213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4284.

The product of its digits is 9450, while the sum is 33.

The square root of 71955213 is about 8482.6418644194. The cubic root of 71955213 is about 415.9304867979.

The spelling of 71955213 in words is "seventy-one million, nine hundred fifty-five thousand, two hundred thirteen".