157550509 has 8 divisors (see below), whose sum is σ = 167471928. Its totient is φ = 147701760.

The previous prime is 157550507. The next prime is 157550513. The reversal of 157550509 is 905055751.

It can be written as a sum of positive squares in 4 ways, for example, as 72505225 + 85045284 = 8515^2 + 9222^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157550509 - 2¹ = 157550507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157550501) 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 in 7 ways as a sum of consecutive naturals, for example, 13662 + ... + 22399.

It is an arithmetic number, because the mean of its divisors is an integer number (20933991).

Almost surely, 2^157550509 is an apocalyptic number.

It is an amenable number.

157550509 is a deficient number, since it is larger than the sum of its proper divisors (9921419).

157550509 is a wasteful number, since it uses less digits than its factorization.

157550509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36335.

The product of its (nonzero) digits is 39375, while the sum is 37.

The square root of 157550509 is about 12551.9125634303. The cubic root of 157550509 is about 540.0988719278.

The spelling of 157550509 in words is "one hundred fifty-seven million, five hundred fifty thousand, five hundred nine".