51595990 has 16 divisors (see below), whose sum is σ = 93282480. Its totient is φ = 20547360.

The previous prime is 51595987. The next prime is 51595991. The reversal of 51595990 is 9959515.

It is a happy number.

51595990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51595991) 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 7 ways as a sum of consecutive naturals, for example, 8976 + ... + 13555.

It is an arithmetic number, because the mean of its divisors is an integer number (5830155).

Almost surely, 2^51595990 is an apocalyptic number.

51595990 is a deficient number, since it is larger than the sum of its proper divisors (41686490).

51595990 is a wasteful number, since it uses less digits than its factorization.

51595990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22767.

The product of its (nonzero) digits is 91125, while the sum is 43.

The square root of 51595990 is about 7183.0348739234. The cubic root of 51595990 is about 372.2819527752.

The spelling of 51595990 in words is "fifty-one million, five hundred ninety-five thousand, nine hundred ninety".