61857571 has 2 divisors, whose sum is σ = 61857572. Its totient is φ = 61857570.

The previous prime is 61857541. The next prime is 61857637. The reversal of 61857571 is 17575816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61857571 - 2¹³ = 61849379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61857541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30928785 + 30928786.

It is an arithmetic number, because the mean of its divisors is an integer number (30928786).

Almost surely, 2^61857571 is an apocalyptic number.

61857571 is a deficient number, since it is larger than the sum of its proper divisors (1).

61857571 is an equidigital number, since it uses as much as digits as its factorization.

61857571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58800, while the sum is 40.

The square root of 61857571 is about 7864.9584232849. The cubic root of 61857571 is about 395.4858541069.

The spelling of 61857571 in words is "sixty-one million, eight hundred fifty-seven thousand, five hundred seventy-one".