157318529 has 2 divisors, whose sum is σ = 157318530. Its totient is φ = 157318528.

The previous prime is 157318489. The next prime is 157318531. The reversal of 157318529 is 925813751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115068529 + 42250000 = 10727^2 + 6500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157318529 is a prime.

Together with 157318531, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (157318559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78659264 + 78659265.

It is an arithmetic number, because the mean of its divisors is an integer number (78659265).

Almost surely, 2^157318529 is an apocalyptic number.

It is an amenable number.

157318529 is a deficient number, since it is larger than the sum of its proper divisors (1).

157318529 is an equidigital number, since it uses as much as digits as its factorization.

157318529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 41.

The square root of 157318529 is about 12542.6683365223. The cubic root of 157318529 is about 539.8336581846.

It can be divided in two parts, 1573 and 18529, that added together give a palindrome (20102).

The spelling of 157318529 in words is "one hundred fifty-seven million, three hundred eighteen thousand, five hundred twenty-nine".