157857503 has 8 divisors (see below), whose sum is σ = 166079760. Its totient is φ = 149843520.

The previous prime is 157857493. The next prime is 157857517. The reversal of 157857503 is 305758751.

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

It is not a de Polignac number, because 157857503 - 2¹⁶ = 157791967 is a prime.

It is a super-4 number, since 4×157857503⁴ (a number of 34 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157857103) 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 7 ways as a sum of consecutive naturals, for example, 50513 + ... + 53546.

It is an arithmetic number, because the mean of its divisors is an integer number (20759970).

Almost surely, 2^157857503 is an apocalyptic number.

157857503 is a deficient number, since it is larger than the sum of its proper divisors (8222257).

157857503 is a wasteful number, since it uses less digits than its factorization.

157857503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104137.

The product of its (nonzero) digits is 147000, while the sum is 41.

The square root of 157857503 is about 12564.1355850691. The cubic root of 157857503 is about 540.4494463488.

The spelling of 157857503 in words is "one hundred fifty-seven million, eight hundred fifty-seven thousand, five hundred three".