51920242 has 32 divisors (see below), whose sum is σ = 87609600. Its totient is φ = 22874880.

The previous prime is 51920233. The next prime is 51920249. The reversal of 51920242 is 24202915.

51920242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51920249) 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 15 ways as a sum of consecutive naturals, for example, 153898 + ... + 154234.

It is an arithmetic number, because the mean of its divisors is an integer number (2737800).

Almost surely, 2^51920242 is an apocalyptic number.

51920242 is a deficient number, since it is larger than the sum of its proper divisors (35689358).

51920242 is a wasteful number, since it uses less digits than its factorization.

51920242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 51920242 is about 7205.5702064445. The cubic root of 51920242 is about 373.0601862213.

The spelling of 51920242 in words is "fifty-one million, nine hundred twenty thousand, two hundred forty-two".