1902143881 has 16 divisors (see below), whose sum is σ = 2088979200. Its totient is φ = 1717672320.

The previous prime is 1902143813. The next prime is 1902143891. The reversal of 1902143881 is 1883412091.

It is a cyclic number.

It is not a de Polignac number, because 1902143881 - 2¹³ = 1902135689 is a prime.

It is a super-3 number, since 3×1902143881³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1902143881.

It is not an unprimeable number, because it can be changed into a prime (1902143891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1200816 + ... + 1202398.

It is an arithmetic number, because the mean of its divisors is an integer number (130561200).

Almost surely, 2^1902143881 is an apocalyptic number.

1902143881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1902143881 is a deficient number, since it is larger than the sum of its proper divisors (186835319).

1902143881 is a wasteful number, since it uses less digits than its factorization.

1902143881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2256.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1902143881 is about 43613.5745038170. The cubic root of 1902143881 is about 1239.0280019372.

The spelling of 1902143881 in words is "one billion, nine hundred two million, one hundred forty-three thousand, eight hundred eighty-one".