157457771 has 2 divisors, whose sum is σ = 157457772. Its totient is φ = 157457770.

The previous prime is 157457767. The next prime is 157457813. The reversal of 157457771 is 177754751.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157457771 - 2² = 157457767 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (157457071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78728885 + 78728886.

It is an arithmetic number, because the mean of its divisors is an integer number (78728886).

Almost surely, 2^157457771 is an apocalyptic number.

157457771 is a deficient number, since it is larger than the sum of its proper divisors (1).

157457771 is an equidigital number, since it uses as much as digits as its factorization.

157457771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240100, while the sum is 44.

The square root of 157457771 is about 12548.2178415901. The cubic root of 157457771 is about 539.9928794214.

The spelling of 157457771 in words is "one hundred fifty-seven million, four hundred fifty-seven thousand, seven hundred seventy-one".