231533454051220 has 48 divisors (see below), whose sum is σ = 487310416603920. Its totient is φ = 92405832293376.

The previous prime is 231533454051209. The next prime is 231533454051223. The reversal of 231533454051220 is 22150454335132.

It can be written as a sum of positive squares in 8 ways, for example, as 17367439465476 + 214166014585744 = 4167426^2 + 14634412^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231533454051223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33632824 + ... + 39927856.

It is an arithmetic number, because the mean of its divisors is an integer number (10152300345915).

Almost surely, 2^{231533454051220} is an apocalyptic number.

231533454051220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231533454051220 is an abundant number, since it is smaller than the sum of its proper divisors (255776962552700).

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

231533454051220 is a wasteful number, since it uses less digits than its factorization.

231533454051220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6299164 (or 6299162 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 40.

The spelling of 231533454051220 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, four hundred fifty-four million, fifty-one thousand, two hundred twenty".