157238449 has 4 divisors (see below), whose sum is σ = 157279860. Its totient is φ = 157197040.

The previous prime is 157238447. The next prime is 157238467. The reversal of 157238449 is 944832751.

157238449 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, and also an emirpimes, since its reverse is a distinct semiprime: 944832751 = 157 ⋅6018043.

It can be written as a sum of positive squares in 2 ways, for example, as 118113424 + 39125025 = 10868^2 + 6255^2 .

It is a cyclic number.

It is not a de Polignac number, because 157238449 - 2¹ = 157238447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157238441) 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, 14362 + ... + 22819.

It is an arithmetic number, because the mean of its divisors is an integer number (39319965).

Almost surely, 2^157238449 is an apocalyptic number.

It is an amenable number.

157238449 is a deficient number, since it is larger than the sum of its proper divisors (41411).

157238449 is an equidigital number, since it uses as much as digits as its factorization.

157238449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41410.

The product of its digits is 241920, while the sum is 43.

The square root of 157238449 is about 12539.4756269949. The cubic root of 157238449 is about 539.7420452919.

The spelling of 157238449 in words is "one hundred fifty-seven million, two hundred thirty-eight thousand, four hundred forty-nine".