231121747493 has 24 divisors (see below), whose sum is σ = 289818789120. Its totient is φ = 182687672160.

The previous prime is 231121747477. The next prime is 231121747511. The reversal of 231121747493 is 394747121132.

It is not a de Polignac number, because 231121747493 - 2⁴ = 231121747477 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231121747993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 480788 + ... + 832706.

It is an arithmetic number, because the mean of its divisors is an integer number (12075782880).

Almost surely, 2^231121747493 is an apocalyptic number.

It is an amenable number.

231121747493 is a deficient number, since it is larger than the sum of its proper divisors (58697041627).

231121747493 is a wasteful number, since it uses less digits than its factorization.

231121747493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352977 (or 352970 counting only the distinct ones).

The product of its digits is 254016, while the sum is 44.

The spelling of 231121747493 in words is "two hundred thirty-one billion, one hundred twenty-one million, seven hundred forty-seven thousand, four hundred ninety-three".