51375425 has 12 divisors (see below), whose sum is σ = 65428476. Its totient is φ = 39988800.

The previous prime is 51375421. The next prime is 51375431. The reversal of 51375425 is 52457315.

It can be written as a sum of positive squares in 6 ways, for example, as 1827904 + 49547521 = 1352^2 + 7039^2 .

It is not a de Polignac number, because 51375425 - 2² = 51375421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51375391 and 51375400.

It is not an unprimeable number, because it can be changed into a prime (51375421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26846 + ... + 28695.

It is an arithmetic number, because the mean of its divisors is an integer number (5452373).

Almost surely, 2^51375425 is an apocalyptic number.

It is an amenable number.

51375425 is a deficient number, since it is larger than the sum of its proper divisors (14053051).

51375425 is a wasteful number, since it uses less digits than its factorization.

51375425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55588 (or 55583 counting only the distinct ones).

The product of its digits is 21000, while the sum is 32.

The square root of 51375425 is about 7167.6652405089. The cubic root of 51375425 is about 371.7507121785.

The spelling of 51375425 in words is "fifty-one million, three hundred seventy-five thousand, four hundred twenty-five".