157178357 has 4 divisors (see below), whose sum is σ = 179632416. Its totient is φ = 134724300.

The previous prime is 157178341. The next prime is 157178363. The reversal of 157178357 is 753871751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 753871751 = 20107 ⋅37493.

It is a cyclic number.

It is not a de Polignac number, because 157178357 - 2⁴ = 157178341 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 (157178377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11227019 + ... + 11227032.

It is an arithmetic number, because the mean of its divisors is an integer number (44908104).

Almost surely, 2^157178357 is an apocalyptic number.

It is an amenable number.

157178357 is a deficient number, since it is larger than the sum of its proper divisors (22454059).

157178357 is an equidigital number, since it uses as much as digits as its factorization.

157178357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22454058.

The product of its digits is 205800, while the sum is 44.

The square root of 157178357 is about 12537.0792850648. The cubic root of 157178357 is about 539.6732785836.

The spelling of 157178357 in words is "one hundred fifty-seven million, one hundred seventy-eight thousand, three hundred fifty-seven".