71615057 has 2 divisors, whose sum is σ = 71615058. Its totient is φ = 71615056.

The previous prime is 71615039. The next prime is 71615083. The reversal of 71615057 is 75051617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36675136 + 34939921 = 6056^2 + 5911^2 .

It is a cyclic number.

It is not a de Polignac number, because 71615057 - 2¹⁶ = 71549521 is a prime.

It is a super-2 number, since 2×71615057² = 10257432778226498, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71615087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35807528 + 35807529.

It is an arithmetic number, because the mean of its divisors is an integer number (35807529).

Almost surely, 2^71615057 is an apocalyptic number.

It is an amenable number.

71615057 is a deficient number, since it is larger than the sum of its proper divisors (1).

71615057 is an equidigital number, since it uses as much as digits as its factorization.

71615057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7350, while the sum is 32.

The square root of 71615057 is about 8462.5679908642. The cubic root of 71615057 is about 415.2740378071.

The spelling of 71615057 in words is "seventy-one million, six hundred fifteen thousand, fifty-seven".