61447271 has 2 divisors, whose sum is σ = 61447272. Its totient is φ = 61447270.

The previous prime is 61447249. The next prime is 61447277. The reversal of 61447271 is 17274416.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61447271 - 2⁶ = 61447207 is a prime.

It is a super-2 number, since 2×61447271² = 7551534226694882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61447277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30723635 + 30723636.

It is an arithmetic number, because the mean of its divisors is an integer number (30723636).

Almost surely, 2^61447271 is an apocalyptic number.

61447271 is a deficient number, since it is larger than the sum of its proper divisors (1).

61447271 is an equidigital number, since it uses as much as digits as its factorization.

61447271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 32.

The square root of 61447271 is about 7838.8309715161. The cubic root of 61447271 is about 394.6094971018.

The spelling of 61447271 in words is "sixty-one million, four hundred forty-seven thousand, two hundred seventy-one".