231378523 has 4 divisors (see below), whose sum is σ = 243556360. Its totient is φ = 219200688.

The previous prime is 231378493. The next prime is 231378533. The reversal of 231378523 is 325873132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231378523 is a prime.

It is a super-3 number, since 3×231378523³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231378533) 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, 6088890 + ... + 6088927.

It is an arithmetic number, because the mean of its divisors is an integer number (60889090).

Almost surely, 2^231378523 is an apocalyptic number.

231378523 is a deficient number, since it is larger than the sum of its proper divisors (12177837).

231378523 is a wasteful number, since it uses less digits than its factorization.

231378523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12177836.

The product of its digits is 30240, while the sum is 34.

The square root of 231378523 is about 15211.1315489677. The cubic root of 231378523 is about 613.9142037242.

The spelling of 231378523 in words is "two hundred thirty-one million, three hundred seventy-eight thousand, five hundred twenty-three".