71572297 has 8 divisors (see below), whose sum is σ = 78615360. Its totient is φ = 64856880.

The previous prime is 71572283. The next prime is 71572301. The reversal of 71572297 is 79227517.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71572297 - 2⁷ = 71572169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71572217) 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, 81454 + ... + 82327.

It is an arithmetic number, because the mean of its divisors is an integer number (9826920).

Almost surely, 2^71572297 is an apocalyptic number.

It is an amenable number.

71572297 is a deficient number, since it is larger than the sum of its proper divisors (7043063).

71572297 is a wasteful number, since it uses less digits than its factorization.

71572297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163823.

The product of its digits is 61740, while the sum is 40.

The square root of 71572297 is about 8460.0411937531. The cubic root of 71572297 is about 415.1913705864.

The spelling of 71572297 in words is "seventy-one million, five hundred seventy-two thousand, two hundred ninety-seven".