61572271 has 2 divisors, whose sum is σ = 61572272. Its totient is φ = 61572270.

The previous prime is 61572253. The next prime is 61572319. The reversal of 61572271 is 17227516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61572271 - 2⁷ = 61572143 is a prime.

It is a super-2 number, since 2×61572271² = 7582289112194882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61572221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30786135 + 30786136.

It is an arithmetic number, because the mean of its divisors is an integer number (30786136).

Almost surely, 2^61572271 is an apocalyptic number.

61572271 is a deficient number, since it is larger than the sum of its proper divisors (1).

61572271 is an equidigital number, since it uses as much as digits as its factorization.

61572271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5880, while the sum is 31.

The square root of 61572271 is about 7846.8000484274. The cubic root of 61572271 is about 394.8768958898.

Adding to 61572271 its reverse (17227516), we get a palindrome (78799787).

The spelling of 61572271 in words is "sixty-one million, five hundred seventy-two thousand, two hundred seventy-one".