51203125 has 28 divisors (see below), whose sum is σ = 66796020. Its totient is φ = 39200000.

The previous prime is 51203123. The next prime is 51203147. The reversal of 51203125 is 52130215.

It can be written as a sum of positive squares in 14 ways, for example, as 27941796 + 23261329 = 5286^2 + 4823^2 .

It is not a de Polignac number, because 51203125 - 2¹ = 51203123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51203123) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 453069 + ... + 453181.

Almost surely, 2^51203125 is an apocalyptic number.

It is an amenable number.

51203125 is a deficient number, since it is larger than the sum of its proper divisors (15592895).

51203125 is an frugal number, since it uses more digits than its factorization.

51203125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 51203125 is about 7155.6358906809. The cubic root of 51203125 is about 371.3346612047.

It can be divided in two parts, 5120 and 3125, that multiplied together give a square (16000000 = 4000²).

The spelling of 51203125 in words is "fifty-one million, two hundred three thousand, one hundred twenty-five".