231149403 has 8 divisors (see below), whose sum is σ = 342443600. Its totient is φ = 154099584.

The previous prime is 231149393. The next prime is 231149437. The reversal of 231149403 is 304941132.

It is not a de Polignac number, because 231149403 - 2⁵ = 231149371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8561089 = 231149403 / (2 + 3 + 1 + 1 + 4 + 9 + 4 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231149453) 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, 4280518 + ... + 4280571.

It is an arithmetic number, because the mean of its divisors is an integer number (42805450).

Almost surely, 2^231149403 is an apocalyptic number.

231149403 is a deficient number, since it is larger than the sum of its proper divisors (111294197).

231149403 is an equidigital number, since it uses as much as digits as its factorization.

231149403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8561098 (or 8561092 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 231149403 is about 15203.5983569680. The cubic root of 231149403 is about 613.7114962371.

The spelling of 231149403 in words is "two hundred thirty-one million, one hundred forty-nine thousand, four hundred three".