385250503 has 4 divisors (see below), whose sum is σ = 420273288. Its totient is φ = 350227720.

The previous prime is 385250501. The next prime is 385250521. The reversal of 385250503 is 305052583.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 305052583 = 11 ⋅27732053.

It is a cyclic number.

It is not a de Polignac number, because 385250503 - 2¹ = 385250501 is a prime.

It is a super-3 number, since 3×385250503³ (a number of 27 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385250501) 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, 17511376 + ... + 17511397.

It is an arithmetic number, because the mean of its divisors is an integer number (105068322).

Almost surely, 2^385250503 is an apocalyptic number.

385250503 is the 10492-nd centered heptagonal number.

385250503 is a deficient number, since it is larger than the sum of its proper divisors (35022785).

385250503 is a wasteful number, since it uses less digits than its factorization.

385250503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35022784.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 385250503 is about 19627.7992398537. The cubic root of 385250503 is about 727.6363803947.

The spelling of 385250503 in words is "three hundred eighty-five million, two hundred fifty thousand, five hundred three".