2003661250 has 20 divisors (see below), whose sum is σ = 3755664990. Its totient is φ = 801464000.

The previous prime is 2003661229. The next prime is 2003661271. The reversal of 2003661250 is 521663002.

It is an interprime number because it is at equal distance from previous prime (2003661229) and next prime (2003661271).

It can be written as a sum of positive squares in 5 ways, for example, as 395731449 + 1607929801 = 19893^2 + 40099^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 800215 + ... + 802714.

Almost surely, 2^2003661250 is an apocalyptic number.

2003661250 is a deficient number, since it is larger than the sum of its proper divisors (1752003740).

2003661250 is an equidigital number, since it uses as much as digits as its factorization.

2003661250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602951 (or 1602936 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 2003661250 is about 44762.2748528267. The cubic root of 2003661250 is about 1260.6893955585.

The spelling of 2003661250 in words is "two billion, three million, six hundred sixty-one thousand, two hundred fifty".