231855628749 has 32 divisors (see below), whose sum is σ = 338695240320. Its totient is φ = 140427313152.

The previous prime is 231855628733. The next prime is 231855628759. The reversal of 231855628749 is 947826558132.

It is not a de Polignac number, because 231855628749 - 2⁴ = 231855628733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231855628692 and 231855628701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231855628759) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6894594 + ... + 6928140.

It is an arithmetic number, because the mean of its divisors is an integer number (10584226260).

Almost surely, 2^231855628749 is an apocalyptic number.

231855628749 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

231855628749 is a deficient number, since it is larger than the sum of its proper divisors (106839611571).

231855628749 is a wasteful number, since it uses less digits than its factorization.

231855628749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38269.

The product of its digits is 29030400, while the sum is 60.

The spelling of 231855628749 in words is "two hundred thirty-one billion, eight hundred fifty-five million, six hundred twenty-eight thousand, seven hundred forty-nine".