157371919 has 4 divisors (see below), whose sum is σ = 157397344. Its totient is φ = 157346496.

The previous prime is 157371917. The next prime is 157371931. The reversal of 157371919 is 919173751.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 919173751 = 103 ⋅8924017.

It is a cyclic number.

It is not a de Polignac number, because 157371919 - 2¹ = 157371917 is a prime.

It is a super-2 number, since 2×157371919² = 49531841779485122, 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 (157371917) 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 3 ways as a sum of consecutive naturals, for example, 3274 + ... + 18040.

It is an arithmetic number, because the mean of its divisors is an integer number (39349336).

Almost surely, 2^157371919 is an apocalyptic number.

157371919 is a deficient number, since it is larger than the sum of its proper divisors (25425).

157371919 is a wasteful number, since it uses less digits than its factorization.

157371919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25424.

The product of its digits is 59535, while the sum is 43.

The square root of 157371919 is about 12544.7964909759. The cubic root of 157371919 is about 539.8947199877.

The spelling of 157371919 in words is "one hundred fifty-seven million, three hundred seventy-one thousand, nine hundred nineteen".