157271537 has 2 divisors, whose sum is σ = 157271538. Its totient is φ = 157271536.

The previous prime is 157271473. The next prime is 157271549. The reversal of 157271537 is 735172751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130325056 + 26946481 = 11416^2 + 5191^2 .

It is an emirp because it is prime and its reverse (735172751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157271537 - 2⁶ = 157271473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157271537.

It is not a weakly prime, because it can be changed into another prime (157271557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78635768 + 78635769.

It is an arithmetic number, because the mean of its divisors is an integer number (78635769).

Almost surely, 2^157271537 is an apocalyptic number.

It is an amenable number.

157271537 is a deficient number, since it is larger than the sum of its proper divisors (1).

157271537 is an equidigital number, since it uses as much as digits as its factorization.

157271537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51450, while the sum is 38.

The square root of 157271537 is about 12540.7949110094. The cubic root of 157271537 is about 539.7799023011.

The spelling of 157271537 in words is "one hundred fifty-seven million, two hundred seventy-one thousand, five hundred thirty-seven".