231257378 has 24 divisors (see below), whose sum is σ = 382203696. Its totient is φ = 104864760.

The previous prime is 231257371. The next prime is 231257407. The reversal of 231257378 is 873752132.

It is not an unprimeable number, because it can be changed into a prime (231257371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131501 + ... + 133247.

It is an arithmetic number, because the mean of its divisors is an integer number (15925154).

Almost surely, 2^231257378 is an apocalyptic number.

231257378 is a deficient number, since it is larger than the sum of its proper divisors (150946318).

231257378 is a wasteful number, since it uses less digits than its factorization.

231257378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318 (or 2307 counting only the distinct ones).

The product of its digits is 70560, while the sum is 38.

The square root of 231257378 is about 15207.1489109563. The cubic root of 231257378 is about 613.8070407675.

It can be divided in two parts, 23125 and 7378, that added together give a palindrome (30503).

The spelling of 231257378 in words is "two hundred thirty-one million, two hundred fifty-seven thousand, three hundred seventy-eight".