231381010446 has 16 divisors (see below), whose sum is σ = 464408864208. Its totient is φ = 76852529600.

The previous prime is 231381010429. The next prime is 231381010447. The reversal of 231381010446 is 644010183132.

It is a super-2 number, since 2×231381010446² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231381010447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68616645 + ... + 68620016.

It is an arithmetic number, because the mean of its divisors is an integer number (29025554013).

Almost surely, 2^231381010446 is an apocalyptic number.

231381010446 is an abundant number, since it is smaller than the sum of its proper divisors (233027853762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231381010446 is a wasteful number, since it uses less digits than its factorization.

231381010446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137236947.

The product of its (nonzero) digits is 13824, while the sum is 33.

Adding to 231381010446 its reverse (644010183132), we get a palindrome (875391193578).

The spelling of 231381010446 in words is "two hundred thirty-one billion, three hundred eighty-one million, ten thousand, four hundred forty-six".