157545919 has 4 divisors (see below), whose sum is σ = 166813344. Its totient is φ = 148278496.

The previous prime is 157545917. The next prime is 157545943. The reversal of 157545919 is 919545751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 919545751 = 24281 ⋅37871.

It is a cyclic number.

It is not a de Polignac number, because 157545919 - 2¹ = 157545917 is a prime.

It is a super-2 number, since 2×157545919² = 49641433187109122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157545917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4633687 + ... + 4633720.

It is an arithmetic number, because the mean of its divisors is an integer number (41703336).

Almost surely, 2^157545919 is an apocalyptic number.

157545919 is a deficient number, since it is larger than the sum of its proper divisors (9267425).

157545919 is an equidigital number, since it uses as much as digits as its factorization.

157545919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9267424.

The product of its digits is 283500, while the sum is 46.

The square root of 157545919 is about 12551.7297214368. The cubic root of 157545919 is about 540.0936268842.

The spelling of 157545919 in words is "one hundred fifty-seven million, five hundred forty-five thousand, nine hundred nineteen".