231551431354390 has 16 divisors (see below), whose sum is σ = 476334373072032. Its totient is φ = 79389062178624.

The previous prime is 231551431354379. The next prime is 231551431354409. The reversal of 231551431354390 is 93453134155132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1653938795319 + ... + 1653938795458.

It is an arithmetic number, because the mean of its divisors is an integer number (29770898317002).

Almost surely, 2^{231551431354390} is an apocalyptic number.

231551431354390 is an abundant number, since it is smaller than the sum of its proper divisors (244782941717642).

231551431354390 is a wasteful number, since it uses less digits than its factorization.

231551431354390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3307877590791.

The product of its (nonzero) digits is 2916000, while the sum is 49.

The spelling of 231551431354390 in words is "two hundred thirty-one trillion, five hundred fifty-one billion, four hundred thirty-one million, three hundred fifty-four thousand, three hundred ninety".