231545023 has 4 divisors (see below), whose sum is σ = 233594208. Its totient is φ = 229495840.

The previous prime is 231545011. The next prime is 231545029. The reversal of 231545023 is 320545132.

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

It is a cyclic number.

It is not a de Polignac number, because 231545023 - 2¹⁷ = 231413951 is a prime.

It is a super-2 number, since 2×231545023² = 107226195352141058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231545029) 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 3 ways as a sum of consecutive naturals, for example, 1024423 + ... + 1024648.

It is an arithmetic number, because the mean of its divisors is an integer number (58398552).

Almost surely, 2^231545023 is an apocalyptic number.

231545023 is a deficient number, since it is larger than the sum of its proper divisors (2049185).

231545023 is a wasteful number, since it uses less digits than its factorization.

231545023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2049184.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 231545023 is about 15216.6035303546. The cubic root of 231545023 is about 614.0614259830.

The spelling of 231545023 in words is "two hundred thirty-one million, five hundred forty-five thousand, twenty-three".