157310509 has 2 divisors, whose sum is σ = 157310510. Its totient is φ = 157310508.

The previous prime is 157310507. The next prime is 157310533. The reversal of 157310509 is 905013751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151536100 + 5774409 = 12310^2 + 2403^2 .

It is a cyclic number.

It is not a de Polignac number, because 157310509 - 2¹ = 157310507 is a prime.

Together with 157310507, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157310507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78655254 + 78655255.

It is an arithmetic number, because the mean of its divisors is an integer number (78655255).

Almost surely, 2^157310509 is an apocalyptic number.

It is an amenable number.

157310509 is a deficient number, since it is larger than the sum of its proper divisors (1).

157310509 is an equidigital number, since it uses as much as digits as its factorization.

157310509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4725, while the sum is 31.

The square root of 157310509 is about 12542.3486237626. The cubic root of 157310509 is about 539.8244845682.

The spelling of 157310509 in words is "one hundred fifty-seven million, three hundred ten thousand, five hundred nine".