71971152 has 40 divisors (see below), whose sum is σ = 202829280. Its totient is φ = 21809280.

The previous prime is 71971139. The next prime is 71971157. The reversal of 71971152 is 25117917.

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 (71971157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67627 + ... + 68682.

It is an arithmetic number, because the mean of its divisors is an integer number (5070732).

Almost surely, 2^71971152 is an apocalyptic number.

It is an amenable number.

71971152 is an abundant number, since it is smaller than the sum of its proper divisors (130858128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71971152 is a wasteful number, since it uses less digits than its factorization.

71971152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136331 (or 136325 counting only the distinct ones).

The product of its digits is 4410, while the sum is 33.

The square root of 71971152 is about 8483.5813192307. The cubic root of 71971152 is about 415.9611958381.

The spelling of 71971152 in words is "seventy-one million, nine hundred seventy-one thousand, one hundred fifty-two".