231533531202550 has 48 divisors (see below), whose sum is σ = 453320986827600. Its totient is φ = 87738498864000.

The previous prime is 231533531202539. The next prime is 231533531202601. The reversal of 231533531202550 is 55202135335132.

It is a super-2 number, since 2×231533531202550² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183005536 + ... + 184266364.

It is an arithmetic number, because the mean of its divisors is an integer number (9444187225575).

Almost surely, 2^{231533531202550} is an apocalyptic number.

231533531202550 is a deficient number, since it is larger than the sum of its proper divisors (221787455625050).

231533531202550 is a wasteful number, since it uses less digits than its factorization.

231533531202550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454161 (or 1454156 counting only the distinct ones).

The product of its (nonzero) digits is 405000, while the sum is 40.

Adding to 231533531202550 its reverse (55202135335132), we get a palindrome (286735666537682).

The spelling of 231533531202550 in words is "two hundred thirty-one trillion, five hundred thirty-three billion, five hundred thirty-one million, two hundred two thousand, five hundred fifty".