231545053140 has 48 divisors (see below), whose sum is σ = 648419929920. Its totient is φ = 61736416000.

The previous prime is 231545053127. The next prime is 231545053147. The reversal of 231545053140 is 41350545132.

It is a super-2 number, since 2×231545053140² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231545053147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144451 + ... + 695669.

It is an arithmetic number, because the mean of its divisors is an integer number (13508748540).

Almost surely, 2^231545053140 is an apocalyptic number.

231545053140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231545053140 is an abundant number, since it is smaller than the sum of its proper divisors (416874876780).

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

231545053140 is a wasteful number, since it uses less digits than its factorization.

231545053140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558232 (or 558230 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 231545053140 its reverse (41350545132), we get a palindrome (272895598272).

The spelling of 231545053140 in words is "two hundred thirty-one billion, five hundred forty-five million, fifty-three thousand, one hundred forty".