157533809 has 4 divisors (see below), whose sum is σ = 157564020. Its totient is φ = 157503600.

The previous prime is 157533799. The next prime is 157533851. The reversal of 157533809 is 908335751.

It is a happy number.

157533809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120384784 + 37149025 = 10972^2 + 6095^2 .

It is a cyclic number.

It is not a de Polignac number, because 157533809 - 2²⁴ = 140756593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157533889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5054 + ... + 18455.

It is an arithmetic number, because the mean of its divisors is an integer number (39391005).

Almost surely, 2^157533809 is an apocalyptic number.

It is an amenable number.

157533809 is a deficient number, since it is larger than the sum of its proper divisors (30211).

157533809 is an equidigital number, since it uses as much as digits as its factorization.

157533809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30210.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 157533809 is about 12551.2473085347. The cubic root of 157533809 is about 540.0797881645.

The spelling of 157533809 in words is "one hundred fifty-seven million, five hundred thirty-three thousand, eight hundred nine".