71512201 has 2 divisors, whose sum is σ = 71512202. Its totient is φ = 71512200.

The previous prime is 71512169. The next prime is 71512229. The reversal of 71512201 is 10221517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39702601 + 31809600 = 6301^2 + 5640^2 .

It is an emirp because it is prime and its reverse (10221517) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71512201 - 2⁵ = 71512169 is a prime.

It is a super-2 number, since 2×71512201² = 10227989783728802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71512261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35756100 + 35756101.

It is an arithmetic number, because the mean of its divisors is an integer number (35756101).

Almost surely, 2^71512201 is an apocalyptic number.

It is an amenable number.

71512201 is a deficient number, since it is larger than the sum of its proper divisors (1).

71512201 is an equidigital number, since it uses as much as digits as its factorization.

71512201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 71512201 is about 8456.4886921228. The cubic root of 71512201 is about 415.0751322819.

Adding to 71512201 its reverse (10221517), we get a palindrome (81733718).

The spelling of 71512201 in words is "seventy-one million, five hundred twelve thousand, two hundred one".