61716271 has 2 divisors, whose sum is σ = 61716272. Its totient is φ = 61716270.

The previous prime is 61716211. The next prime is 61716287. The reversal of 61716271 is 17261716.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61716271 - 2²³ = 53327663 is a prime.

It is a super-2 number, since 2×61716271² = 7617796212290882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61716211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30858135 + 30858136.

It is an arithmetic number, because the mean of its divisors is an integer number (30858136).

Almost surely, 2^61716271 is an apocalyptic number.

61716271 is a deficient number, since it is larger than the sum of its proper divisors (1).

61716271 is an equidigital number, since it uses as much as digits as its factorization.

61716271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 31.

The square root of 61716271 is about 7855.9704047304. The cubic root of 61716271 is about 395.1844910750.

Adding to 61716271 its reverse (17261716), we get a palindrome (78977987).

The spelling of 61716271 in words is "sixty-one million, seven hundred sixteen thousand, two hundred seventy-one".