157720143 has 8 divisors (see below), whose sum is σ = 240335488. Its totient is φ = 90125784.

The previous prime is 157720139. The next prime is 157720151. The reversal of 157720143 is 341027751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157720143 - 2² = 157720139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157720143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157720133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3755221 + ... + 3755262.

It is an arithmetic number, because the mean of its divisors is an integer number (30041936).

Almost surely, 2^157720143 is an apocalyptic number.

157720143 is a deficient number, since it is larger than the sum of its proper divisors (82615345).

157720143 is an equidigital number, since it uses as much as digits as its factorization.

157720143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7510493.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 157720143 is about 12558.6680424319. The cubic root of 157720143 is about 540.2926431620.

Adding to 157720143 its reverse (341027751), we get a palindrome (498747894).

The spelling of 157720143 in words is "one hundred fifty-seven million, seven hundred twenty thousand, one hundred forty-three".