157219871 has 4 divisors (see below), whose sum is σ = 161054544. Its totient is φ = 153385200.

The previous prime is 157219861. The next prime is 157219877. The reversal of 157219871 is 178912751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178912751 = 103 ⋅1737017.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157219871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 3834631 = 157219871 / (1 + 5 + 7 + 2 + 1 + 9 + 8 + 7 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157219877) 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, 1917275 + ... + 1917356.

It is an arithmetic number, because the mean of its divisors is an integer number (40263636).

Almost surely, 2^157219871 is an apocalyptic number.

157219871 is a deficient number, since it is larger than the sum of its proper divisors (3834673).

157219871 is an equidigital number, since it uses as much as digits as its factorization.

157219871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3834672.

The product of its digits is 35280, while the sum is 41.

The square root of 157219871 is about 12538.7348245347. The cubic root of 157219871 is about 539.7207872965.

The spelling of 157219871 in words is "one hundred fifty-seven million, two hundred nineteen thousand, eight hundred seventy-one".