157535509 has 2 divisors, whose sum is σ = 157535510. Its totient is φ = 157535508.

The previous prime is 157535507. The next prime is 157535551. The reversal of 157535509 is 905535751.

157535509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87478609 + 70056900 = 9353^2 + 8370^2 .

It is a cyclic number.

It is not a de Polignac number, because 157535509 - 2¹ = 157535507 is a prime.

Together with 157535507, 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 (157535501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78767754 + 78767755.

It is an arithmetic number, because the mean of its divisors is an integer number (78767755).

Almost surely, 2^157535509 is an apocalyptic number.

It is an amenable number.

157535509 is a deficient number, since it is larger than the sum of its proper divisors (1).

157535509 is an equidigital number, since it uses as much as digits as its factorization.

157535509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118125, while the sum is 40.

The square root of 157535509 is about 12551.3150307050. The cubic root of 157535509 is about 540.0817308847.

The spelling of 157535509 in words is "one hundred fifty-seven million, five hundred thirty-five thousand, five hundred nine".