71315057 has 8 divisors (see below), whose sum is σ = 77988960. Its totient is φ = 64672960.

The previous prime is 71315053. The next prime is 71315059. The reversal of 71315057 is 75051317.

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

It is not a de Polignac number, because 71315057 - 2² = 71315053 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71315053) 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, 3128 + ... + 12345.

It is an arithmetic number, because the mean of its divisors is an integer number (9748620).

Almost surely, 2^71315057 is an apocalyptic number.

It is an amenable number.

71315057 is a deficient number, since it is larger than the sum of its proper divisors (6673903).

71315057 is a wasteful number, since it uses less digits than its factorization.

71315057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15903.

The product of its (nonzero) digits is 3675, while the sum is 29.

The square root of 71315057 is about 8444.8242728905. The cubic root of 71315057 is about 414.6933564836.

The spelling of 71315057 in words is "seventy-one million, three hundred fifteen thousand, fifty-seven".