2031221542 has 8 divisors (see below), whose sum is σ = 3482094096. Its totient is φ = 870523512.

The previous prime is 2031221459. The next prime is 2031221561. The reversal of 2031221542 is 2451221302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 72543613 + ... + 72543640.

It is an arithmetic number, because the mean of its divisors is an integer number (435261762).

Almost surely, 2^2031221542 is an apocalyptic number.

2031221542 is a deficient number, since it is larger than the sum of its proper divisors (1450872554).

2031221542 is a wasteful number, since it uses less digits than its factorization.

2031221542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145087262.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2031221542 is about 45069.0752290304. The cubic root of 2031221542 is about 1266.4433403906.

Adding to 2031221542 its reverse (2451221302), we get a palindrome (4482442844).

The spelling of 2031221542 in words is "two billion, thirty-one million, two hundred twenty-one thousand, five hundred forty-two".