1803144381 has 16 divisors (see below), whose sum is σ = 2438905920. Its totient is φ = 1184855040.

The previous prime is 1803144377. The next prime is 1803144383. The reversal of 1803144381 is 1834413081.

It is not a de Polignac number, because 1803144381 - 2² = 1803144377 is a prime.

It is a super-2 number, since 2×1803144381² = 6502659317463746322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803144383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48826 + ... + 77396.

It is an arithmetic number, because the mean of its divisors is an integer number (152431620).

Almost surely, 2^1803144381 is an apocalyptic number.

It is an amenable number.

1803144381 is a deficient number, since it is larger than the sum of its proper divisors (635761539).

1803144381 is a wasteful number, since it uses less digits than its factorization.

1803144381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28876.

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1803144381 is about 42463.4475873074. The cubic root of 1803144381 is about 1217.1483115213.

The spelling of 1803144381 in words is "one billion, eight hundred three million, one hundred forty-four thousand, three hundred eighty-one".