51489425 has 12 divisors (see below), whose sum is σ = 68758620. Its totient is φ = 38022720.

The previous prime is 51489421. The next prime is 51489457. The reversal of 51489425 is 52498415.

It can be written as a sum of positive squares in 6 ways, for example, as 94864 + 51394561 = 308^2 + 7169^2 .

It is not a de Polignac number, because 51489425 - 2² = 51489421 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51489421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78890 + ... + 79539.

It is an arithmetic number, because the mean of its divisors is an integer number (5729885).

Almost surely, 2^51489425 is an apocalyptic number.

It is an amenable number.

51489425 is a deficient number, since it is larger than the sum of its proper divisors (17269195).

51489425 is a wasteful number, since it uses less digits than its factorization.

51489425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158452 (or 158447 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 51489425 is about 7175.6132142138. The cubic root of 51489425 is about 372.0254756708.

The spelling of 51489425 in words is "fifty-one million, four hundred eighty-nine thousand, four hundred twenty-five".