61355471 has 2 divisors, whose sum is σ = 61355472. Its totient is φ = 61355470.

The previous prime is 61355423. The next prime is 61355477. The reversal of 61355471 is 17455316.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61355471 is a prime.

It is a super-3 number, since 3×61355471³ (a number of 24 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61355477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30677735 + 30677736.

It is an arithmetic number, because the mean of its divisors is an integer number (30677736).

Almost surely, 2^61355471 is an apocalyptic number.

61355471 is a deficient number, since it is larger than the sum of its proper divisors (1).

61355471 is an equidigital number, since it uses as much as digits as its factorization.

61355471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 32.

The square root of 61355471 is about 7832.9733179681. The cubic root of 61355471 is about 394.4128883893.

Adding to 61355471 its sum of digits (32), we get a triangular number (61355503 = T₁₁₀₇₇).

The spelling of 61355471 in words is "sixty-one million, three hundred fifty-five thousand, four hundred seventy-one".