2031421542345 has 24 divisors (see below), whose sum is σ = 3791986880136. Its totient is φ = 1000084451328.

The previous prime is 2031421542281. The next prime is 2031421542443. The reversal of 2031421542345 is 5432451241302.

It is a happy number.

2031421542345 is a `hidden beast` number, since 2 + 0 + 3 + 14 + 215 + 423 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 172344384 + 2031249197961 = 13128^2 + 1425219^2 .

It is not a de Polignac number, because 2031421542345 - 2⁶ = 2031421542281 is a prime.

It is a Curzon 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, 1736257144 + ... + 1736258313.

It is an arithmetic number, because the mean of its divisors is an integer number (157999453339).

Almost surely, 2^{2031421542345} is an apocalyptic number.

It is an amenable number.

2031421542345 is a deficient number, since it is larger than the sum of its proper divisors (1760565337791).

2031421542345 is a wasteful number, since it uses less digits than its factorization.

2031421542345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3472515481 (or 3472515478 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 2031421542345 its reverse (5432451241302), we get a palindrome (7463872783647).

The spelling of 2031421542345 in words is "two trillion, thirty-one billion, four hundred twenty-one million, five hundred forty-two thousand, three hundred forty-five".