71722755 has 36 divisors (see below), whose sum is σ = 134632368. Its totient is φ = 35305920.

The previous prime is 71722751. The next prime is 71722769. The reversal of 71722755 is 55722717.

It is not a de Polignac number, because 71722755 - 2² = 71722751 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (71722751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2890 + ... + 12320.

It is an arithmetic number, because the mean of its divisors is an integer number (3739788).

Almost surely, 2^71722755 is an apocalyptic number.

71722755 is a deficient number, since it is larger than the sum of its proper divisors (62909613).

71722755 is a wasteful number, since it uses less digits than its factorization.

71722755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9468 (or 9452 counting only the distinct ones).

The product of its digits is 34300, while the sum is 36.

The square root of 71722755 is about 8468.9287988505. The cubic root of 71722755 is about 415.4821029100.

The spelling of 71722755 in words is "seventy-one million, seven hundred twenty-two thousand, seven hundred fifty-five".