51143425 has 12 divisors (see below), whose sum is σ = 63508336. Its totient is φ = 40856400.

The previous prime is 51143423. The next prime is 51143431. The reversal of 51143425 is 52434115.

It is a happy number.

It is not a de Polignac number, because 51143425 - 2¹ = 51143423 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51143425.

It is not an unprimeable number, because it can be changed into a prime (51143423) 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, 28402 + ... + 30148.

Almost surely, 2^51143425 is an apocalyptic number.

It is an amenable number.

51143425 is a deficient number, since it is larger than the sum of its proper divisors (12364911).

51143425 is a wasteful number, since it uses less digits than its factorization.

51143425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928 (or 2923 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 51143425 is about 7151.4631370091. The cubic root of 51143425 is about 371.1902865486.

The spelling of 51143425 in words is "fifty-one million, one hundred forty-three thousand, four hundred twenty-five".