51254145 has 24 divisors (see below), whose sum is σ = 89145576. Its totient is φ = 27241728.

The previous prime is 51254123. The next prime is 51254149. The reversal of 51254145 is 54145215.

51254145 is a `hidden beast` number, since 512 + 5 + 4 + 145 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 103041 + 51151104 = 321^2 + 7152^2 .

It is not a de Polignac number, because 51254145 - 2⁵ = 51254113 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51254149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12469 + ... + 16061.

It is an arithmetic number, because the mean of its divisors is an integer number (3714399).

Almost surely, 2^51254145 is an apocalyptic number.

It is an amenable number.

51254145 is a deficient number, since it is larger than the sum of its proper divisors (37891431).

51254145 is a wasteful number, since it uses less digits than its factorization.

51254145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3921 (or 3918 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 51254145 is about 7159.2000251425. The cubic root of 51254145 is about 371.4579557973.

The spelling of 51254145 in words is "fifty-one million, two hundred fifty-four thousand, one hundred forty-five".