61317271 has 4 divisors (see below), whose sum is σ = 61348792. Its totient is φ = 61285752.

The previous prime is 61317257. The next prime is 61317293. The reversal of 61317271 is 17271316.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61317271 - 2⁷ = 61317143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61312271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12636 + ... + 16801.

It is an arithmetic number, because the mean of its divisors is an integer number (15337198).

Almost surely, 2^61317271 is an apocalyptic number.

61317271 is a deficient number, since it is larger than the sum of its proper divisors (31521).

61317271 is a wasteful number, since it uses less digits than its factorization.

61317271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31520.

The product of its digits is 1764, while the sum is 28.

The square root of 61317271 is about 7830.5345283703. The cubic root of 61317271 is about 394.3310173951.

Adding to 61317271 its reverse (17271316), we get a palindrome (78588587).

It can be divided in two parts, 61 and 317271, that multiplied together give a triangular number (19353531 = T₆₂₂₁).

The spelling of 61317271 in words is "sixty-one million, three hundred seventeen thousand, two hundred seventy-one".