157538305 has 4 divisors (see below), whose sum is σ = 189045972. Its totient is φ = 126030640.

The previous prime is 157538273. The next prime is 157538317. The reversal of 157538305 is 503835751.

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 106172416 + 51365889 = 10304^2 + 7167^2 .

It is not a de Polignac number, because 157538305 - 2⁵ = 157538273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15753826 + ... + 15753835.

It is an arithmetic number, because the mean of its divisors is an integer number (47261493).

Almost surely, 2^157538305 is an apocalyptic number.

It is an amenable number.

157538305 is a deficient number, since it is larger than the sum of its proper divisors (31507667).

157538305 is an equidigital number, since it uses as much as digits as its factorization.

157538305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31507666.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 157538305 is about 12551.4264129620. The cubic root of 157538305 is about 540.0849260577.

The spelling of 157538305 in words is "one hundred fifty-seven million, five hundred thirty-eight thousand, three hundred five".