231533533143144 has 48 divisors (see below), whose sum is σ = 627071119567620. Its totient is φ = 77177704815360.

The previous prime is 231533533143113. The next prime is 231533533143167. The reversal of 231533533143144 is 441341335335132.

231533533143144 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 33 + 533 + 1 + 43 + 1 + 44 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 222804521983044 + 8729011160100 = 14926638^2 + 2954490^2 .

It is a super-2 number, since 2×231533533143144² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231533533143144.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41958354 + ... + 47154750.

Almost surely, 2^{231533533143144} is an apocalyptic number.

231533533143144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231533533143144 is an abundant number, since it is smaller than the sum of its proper divisors (395537586424476).

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

231533533143144 is a wasteful number, since it uses less digits than its factorization.

231533533143144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5815250 (or 5815243 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 45.

Adding to 231533533143144 its reverse (441341335335132), we get a palindrome (672874868478276).

The spelling of 231533533143144 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, five hundred thirty-three million, one hundred forty-three thousand, one hundred forty-four".