51250090 has 8 divisors (see below), whose sum is σ = 92250180. Its totient is φ = 20500032.

The previous prime is 51250081. The next prime is 51250091. The reversal of 51250090 is 9005215.

It can be written as a sum of positive squares in 2 ways, for example, as 51165409 + 84681 = 7153^2 + 291^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51250091) 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 3 ways as a sum of consecutive naturals, for example, 2562495 + ... + 2562514.

Almost surely, 2^51250090 is an apocalyptic number.

51250090 is a deficient number, since it is larger than the sum of its proper divisors (41000090).

51250090 is a wasteful number, since it uses less digits than its factorization.

51250090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5125016.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 51250090 is about 7158.9168175081. The cubic root of 51250090 is about 371.4481595051.

The spelling of 51250090 in words is "fifty-one million, two hundred fifty thousand, ninety".