51090075 has 24 divisors (see below), whose sum is σ = 93855600. Its totient is φ = 27247680.

The previous prime is 51090029. The next prime is 51090079. The reversal of 51090075 is 57009015.

51090075 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51090075 - 2¹⁶ = 51024539 is a prime.

It is a super-2 number, since 2×51090075² = 5220391527011250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51090079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37170 + ... + 38519.

It is an arithmetic number, because the mean of its divisors is an integer number (3910650).

Almost surely, 2^51090075 is an apocalyptic number.

51090075 is a deficient number, since it is larger than the sum of its proper divisors (42765525).

51090075 is a wasteful number, since it uses less digits than its factorization.

51090075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75708 (or 75697 counting only the distinct ones).

The product of its (nonzero) digits is 1575, while the sum is 27.

The square root of 51090075 is about 7147.7321578246. The cubic root of 51090075 is about 371.0611732326.

The spelling of 51090075 in words is "fifty-one million, ninety thousand, seventy-five".