71857151 has 2 divisors, whose sum is σ = 71857152. Its totient is φ = 71857150.

The previous prime is 71857139. The next prime is 71857169. The reversal of 71857151 is 15175817.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71857151 is a prime.

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 (71853151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35928575 + 35928576.

It is an arithmetic number, because the mean of its divisors is an integer number (35928576).

Almost surely, 2^71857151 is an apocalyptic number.

71857151 is a deficient number, since it is larger than the sum of its proper divisors (1).

71857151 is an equidigital number, since it uses as much as digits as its factorization.

71857151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9800, while the sum is 35.

The square root of 71857151 is about 8476.8597369545. The cubic root of 71857151 is about 415.7414547775.

The spelling of 71857151 in words is "seventy-one million, eight hundred fifty-seven thousand, one hundred fifty-one".