3125781250 has 36 divisors (see below), whose sum is σ = 5862301686. Its totient is φ = 1250000000.

The previous prime is 3125781223. The next prime is 3125781283. The reversal of 3125781250 is 521875213.

It can be written as a sum of positive squares in 9 ways, for example, as 2492705329 + 633075921 = 49927^2 + 25161^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 779250 + ... + 783250.

Almost surely, 2^3125781250 is an apocalyptic number.

3125781250 is a deficient number, since it is larger than the sum of its proper divisors (2736520436).

3125781250 is an frugal number, since it uses more digits than its factorization.

3125781250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043 (or 4008 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 3125781250 is about 55908.6867132470. The cubic root of 3125781250 is about 1462.1306930274.

The spelling of 3125781250 in words is "three billion, one hundred twenty-five million, seven hundred eighty-one thousand, two hundred fifty".