231303266550 has 96 divisors (see below), whose sum is σ = 645437260800. Its totient is φ = 60900072480.

The previous prime is 231303266477. The next prime is 231303266573. The reversal of 231303266550 is 55662303132.

231303266550 is a `hidden beast` number, since 2 + 3 + 13 + 0 + 32 + 66 + 550 = 666.

It is a super-2 number, since 2×231303266550² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 977754 + ... + 1191053.

It is an arithmetic number, because the mean of its divisors is an integer number (6723304800).

Almost surely, 2^231303266550 is an apocalyptic number.

231303266550 is an abundant number, since it is smaller than the sum of its proper divisors (414133994250).

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

231303266550 is a wasteful number, since it uses less digits than its factorization.

231303266550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168907 (or 2168896 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

Adding to 231303266550 its reverse (55662303132), we get a palindrome (286965569682).

The spelling of 231303266550 in words is "two hundred thirty-one billion, three hundred three million, two hundred sixty-six thousand, five hundred fifty".