51250545 has 12 divisors (see below), whose sum is σ = 88834356. Its totient is φ = 27333600.

The previous prime is 51250541. The next prime is 51250567. The reversal of 51250545 is 54505215.

It can be written as a sum of positive squares in 2 ways, for example, as 23970816 + 27279729 = 4896^2 + 5223^2 .

It is not a de Polignac number, because 51250545 - 2² = 51250541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51250541) 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, 569406 + ... + 569495.

It is an arithmetic number, because the mean of its divisors is an integer number (7402863).

Almost surely, 2^51250545 is an apocalyptic number.

It is an amenable number.

51250545 is a deficient number, since it is larger than the sum of its proper divisors (37583811).

51250545 is a wasteful number, since it uses less digits than its factorization.

51250545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138912 (or 1138909 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 51250545 is about 7158.9485959881. The cubic root of 51250545 is about 371.4492587449.

The spelling of 51250545 in words is "fifty-one million, two hundred fifty thousand, five hundred forty-five".