71512229 has 2 divisors, whose sum is σ = 71512230. Its totient is φ = 71512228.

The previous prime is 71512201. The next prime is 71512253. The reversal of 71512229 is 92221517.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64032004 + 7480225 = 8002^2 + 2735^2 .

It is a cyclic number.

It is not a de Polignac number, because 71512229 - 2²⁴ = 54735013 is a prime.

It is a super-2 number, since 2×71512229² = 10227997793096882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71512429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35756114 + 35756115.

It is an arithmetic number, because the mean of its divisors is an integer number (35756115).

Almost surely, 2^71512229 is an apocalyptic number.

It is an amenable number.

71512229 is a deficient number, since it is larger than the sum of its proper divisors (1).

71512229 is an equidigital number, since it uses as much as digits as its factorization.

71512229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 71512229 is about 8456.4903476561. The cubic root of 71512229 is about 415.0751864549.

The spelling of 71512229 in words is "seventy-one million, five hundred twelve thousand, two hundred twenty-nine".